From f2efe2495ffe844601b69aea3ee95fe51d6c9e47 Mon Sep 17 00:00:00 2001
From: epoberezkin <epoberezkin@users.noreply.github.com>
Date: Wed, 5 Nov 2025 11:20:07 +0000
Subject: [PATCH] deploy: 76bfb8b11268f8ed48a022f04d15dc4e1fc2ee35

---
 about/index.html                              | 29 +++++----
 ar/contact/index.html                         | 65 ++++++++++---------
 ar/fdroid/index.html                          | 65 ++++++++++---------
 ar/index.html                                 | 43 ++++++------
 ar/invitation/index.html                      | 65 ++++++++++---------
 ar/messaging/index.html                       | 65 ++++++++++---------
 ar/old/index.html                             | 65 ++++++++++---------
 bg/contact/index.html                         | 65 ++++++++++---------
 bg/fdroid/index.html                          | 65 ++++++++++---------
 bg/index.html                                 | 43 ++++++------
 bg/invitation/index.html                      | 65 ++++++++++---------
 bg/messaging/index.html                       | 65 ++++++++++---------
 bg/old/index.html                             | 65 ++++++++++---------
 blog/20201022-simplex-chat.html               | 29 +++++----
 blog/20210512-simplex-chat-terminal-ui.html   | 29 +++++----
 blog/20210914-simplex-chat-v0.4-released.html | 29 +++++----
 blog/20211208-simplex-chat-v0.5-released.html | 29 +++++----
 blog/20220112-simplex-chat-v1-released.html   | 29 +++++----
 ...20220214-simplex-chat-ios-public-beta.html | 29 +++++----
 blog/20220308-simplex-chat-mobile-apps.html   | 29 +++++----
 ...04-simplex-chat-instant-notifications.html | 29 +++++----
 ...20220511-simplex-chat-v2-images-files.html | 29 +++++----
 .../20220524-simplex-chat-better-privacy.html | 29 +++++----
 ...ex-chat-new-privacy-security-settings.html | 29 +++++----
 ...e-export-import-protocol-improvements.html | 29 +++++----
 ...mplex-chat-v3.1-tor-groups-efficiency.html | 29 +++++----
 ...0220808-simplex-chat-v3.1-chat-groups.html | 29 +++++----
 ...0901-simplex-chat-v3.2-incognito-mode.html | 29 +++++----
 ...28-simplex-chat-v4-encrypted-database.html | 29 +++++----
 ...-chat-v4.2-security-audit-new-website.html | 29 +++++----
 ...1206-simplex-chat-v4.3-voice-messages.html | 29 +++++----
 ...mplex-chat-v4.4-disappearing-messages.html | 29 +++++----
 ...-simplex-chat-v4-5-user-chat-profiles.html | 29 +++++----
 ...230301-simplex-file-transfer-protocol.html | 29 +++++----
 ...328-simplex-chat-v4-6-hidden-profiles.html | 29 +++++----
 ...sion-funding-v5-videos-files-passcode.html | 29 +++++----
 ...sage-reactions-self-destruct-passcode.html | 29 +++++----
 ...x-chat-v5-2-message-delivery-receipts.html | 29 +++++----
 ...cal-file-encryption-directory-service.html | 29 +++++----
 ...sktop-quantum-resistant-better-groups.html | 29 +++++----
 ...implex-ux-private-notes-group-history.html | 29 +++++----
 ...tance-signal-double-ratchet-algorithm.html | 29 +++++----
 ...stant-e2e-encryption-simple-migration.html | 29 +++++----
 ...i-joined-simplex-chat-esraa-al-shafei.html | 29 +++++----
 ...416-dangers-of-metadata-in-messengers.html | 29 +++++----
 ...nsparency-v5-7-better-user-experience.html | 29 +++++----
 ...mplex-redefining-privacy-hard-choices.html | 29 +++++----
 ...ildren-safety-requires-e2e-encryption.html | 29 +++++----
 ...8-private-message-routing-chat-themes.html | 29 +++++----
 ...f-privacy-enforcing-privacy-standards.html | 29 +++++----
 ...6-private-routing-new-user-experience.html | 29 +++++----
 ...y-review-better-calls-user-experience.html | 29 +++++----
 blog/20241016-wired-attack-on-privacy.html    | 29 +++++----
 ...cy-and-decentralization-for-all-users.html | 29 +++++----
 ...k-v6-2-servers-by-flux-business-chats.html | 29 +++++----
 ...k-law-lead-to-mass-scale-surveillance.html | 29 +++++----
 ...privacy-preserving-content-moderation.html | 29 +++++----
 ...er-experience-safety-in-public-groups.html | 29 +++++----
 ...ension-for-securely-connecting-people.html | 29 +++++----
 ...-contacts-protect-groups-app-security.html | 29 +++++----
 blog/index.html                               | 29 +++++----
 contact/index.html                            | 65 ++++++++++---------
 cs/contact/index.html                         | 65 ++++++++++---------
 cs/fdroid/index.html                          | 65 ++++++++++---------
 cs/index.html                                 | 43 ++++++------
 cs/invitation/index.html                      | 65 ++++++++++---------
 cs/messaging/index.html                       | 65 ++++++++++---------
 cs/old/index.html                             | 65 ++++++++++---------
 de/contact/index.html                         | 65 ++++++++++---------
 de/fdroid/index.html                          | 65 ++++++++++---------
 de/index.html                                 | 43 ++++++------
 de/invitation/index.html                      | 65 ++++++++++---------
 de/messaging/index.html                       | 65 ++++++++++---------
 de/old/index.html                             | 65 ++++++++++---------
 directory/index.html                          | 29 +++++----
 docs/android.html                             | 37 ++++++-----
 docs/business.html                            | 31 +++++----
 docs/cli.html                                 | 37 ++++++-----
 docs/code_of_conduct.html                     | 31 +++++----
 docs/contributing.html                        | 37 ++++++-----
 docs/directory.html                           | 29 +++++----
 docs/glossary.html                            | 31 +++++----
 docs/guide/app-settings.html                  | 31 +++++----
 docs/guide/audio-video-calls.html             | 31 +++++----
 docs/guide/chat-profiles.html                 | 31 +++++----
 docs/guide/making-connections.html            | 31 +++++----
 docs/guide/managing-data.html                 | 31 +++++----
 docs/guide/privacy-security.html              | 29 +++++----
 docs/guide/readme.html                        | 31 +++++----
 docs/guide/secret-groups.html                 | 31 +++++----
 docs/guide/send-messages.html                 | 31 +++++----
 docs/lang/cs/android.html                     | 37 ++++++-----
 docs/lang/cs/cli.html                         | 37 ++++++-----
 docs/lang/cs/contributing.html                | 37 ++++++-----
 docs/lang/cs/server.html                      | 37 ++++++-----
 docs/lang/cs/simplex.html                     | 37 ++++++-----
 docs/lang/cs/translations.html                | 37 ++++++-----
 docs/lang/cs/webrtc.html                      | 37 ++++++-----
 docs/lang/fr/android.html                     | 37 ++++++-----
 docs/lang/fr/cli.html                         | 37 ++++++-----
 docs/lang/fr/contributing.html                | 37 ++++++-----
 docs/lang/fr/server.html                      | 37 ++++++-----
 docs/lang/fr/simplex.html                     | 37 ++++++-----
 docs/lang/fr/translations.html                | 37 ++++++-----
 docs/lang/fr/webrtc.html                      | 37 ++++++-----
 docs/lang/pl/android.html                     | 37 ++++++-----
 docs/lang/pl/cli.html                         | 37 ++++++-----
 docs/lang/pl/contributing.html                | 37 ++++++-----
 docs/lang/pl/server.html                      | 37 ++++++-----
 docs/lang/pl/simplex.html                     | 37 ++++++-----
 docs/lang/pl/translations.html                | 37 ++++++-----
 docs/lang/pl/webrtc.html                      | 37 ++++++-----
 docs/protocol/simplex-chat.html               | 31 +++++----
 docs/server.html                              | 37 ++++++-----
 docs/simplex.html                             | 37 ++++++-----
 docs/themes.html                              | 31 +++++----
 docs/trademark.html                           | 31 +++++----
 docs/translations.html                        | 37 ++++++-----
 docs/webrtc.html                              | 37 ++++++-----
 docs/xftp-server.html                         | 31 +++++----
 downloads/index.html                          | 31 +++++----
 en/contact/index.html                         | 65 ++++++++++---------
 en/fdroid/index.html                          | 65 ++++++++++---------
 en/index.html                                 | 43 ++++++------
 en/invitation/index.html                      | 65 ++++++++++---------
 en/messaging/index.html                       | 65 ++++++++++---------
 en/old/index.html                             | 65 ++++++++++---------
 es/contact/index.html                         | 65 ++++++++++---------
 es/fdroid/index.html                          | 65 ++++++++++---------
 es/index.html                                 | 43 ++++++------
 es/invitation/index.html                      | 65 ++++++++++---------
 es/messaging/index.html                       | 65 ++++++++++---------
 es/old/index.html                             | 65 ++++++++++---------
 fa/contact/index.html                         | 65 ++++++++++---------
 fa/fdroid/index.html                          | 65 ++++++++++---------
 fa/index.html                                 | 43 ++++++------
 fa/invitation/index.html                      | 65 ++++++++++---------
 fa/messaging/index.html                       | 65 ++++++++++---------
 fa/old/index.html                             | 65 ++++++++++---------
 faq/index.html                                | 31 +++++----
 fdroid/index.html                             | 65 ++++++++++---------
 fi/contact/index.html                         | 65 ++++++++++---------
 fi/fdroid/index.html                          | 65 ++++++++++---------
 fi/index.html                                 | 43 ++++++------
 fi/invitation/index.html                      | 65 ++++++++++---------
 fi/messaging/index.html                       | 65 ++++++++++---------
 fi/old/index.html                             | 65 ++++++++++---------
 fr/contact/index.html                         | 65 ++++++++++---------
 fr/fdroid/index.html                          | 65 ++++++++++---------
 fr/index.html                                 | 43 ++++++------
 fr/invitation/index.html                      | 65 ++++++++++---------
 fr/messaging/index.html                       | 65 ++++++++++---------
 fr/old/index.html                             | 65 ++++++++++---------
 he/contact/index.html                         | 65 ++++++++++---------
 he/fdroid/index.html                          | 65 ++++++++++---------
 he/index.html                                 | 43 ++++++------
 he/invitation/index.html                      | 65 ++++++++++---------
 he/messaging/index.html                       | 65 ++++++++++---------
 he/old/index.html                             | 65 ++++++++++---------
 hu/contact/index.html                         | 65 ++++++++++---------
 hu/fdroid/index.html                          | 65 ++++++++++---------
 hu/index.html                                 | 43 ++++++------
 hu/invitation/index.html                      | 65 ++++++++++---------
 hu/messaging/index.html                       | 65 ++++++++++---------
 hu/old/index.html                             | 65 ++++++++++---------
 id/contact/index.html                         | 65 ++++++++++---------
 id/fdroid/index.html                          | 65 ++++++++++---------
 id/index.html                                 | 43 ++++++------
 id/invitation/index.html                      | 65 ++++++++++---------
 id/messaging/index.html                       | 65 ++++++++++---------
 id/old/index.html                             | 65 ++++++++++---------
 index.html                                    | 43 ++++++------
 invitation/index.html                         | 65 ++++++++++---------
 it/contact/index.html                         | 65 ++++++++++---------
 it/fdroid/index.html                          | 65 ++++++++++---------
 it/index.html                                 | 43 ++++++------
 it/invitation/index.html                      | 65 ++++++++++---------
 it/messaging/index.html                       | 65 ++++++++++---------
 it/old/index.html                             | 65 ++++++++++---------
 ja/contact/index.html                         | 65 ++++++++++---------
 ja/fdroid/index.html                          | 65 ++++++++++---------
 ja/index.html                                 | 43 ++++++------
 ja/invitation/index.html                      | 65 ++++++++++---------
 ja/messaging/index.html                       | 65 ++++++++++---------
 ja/old/index.html                             | 65 ++++++++++---------
 jobs/index.html                               | 31 +++++----
 messaging/index.html                          | 65 ++++++++++---------
 nl/contact/index.html                         | 65 ++++++++++---------
 nl/fdroid/index.html                          | 65 ++++++++++---------
 nl/index.html                                 | 43 ++++++------
 nl/invitation/index.html                      | 65 ++++++++++---------
 nl/messaging/index.html                       | 65 ++++++++++---------
 nl/old/index.html                             | 65 ++++++++++---------
 old/index.html                                | 65 ++++++++++---------
 pl/contact/index.html                         | 65 ++++++++++---------
 pl/fdroid/index.html                          | 65 ++++++++++---------
 pl/index.html                                 | 43 ++++++------
 pl/invitation/index.html                      | 65 ++++++++++---------
 pl/messaging/index.html                       | 65 ++++++++++---------
 pl/old/index.html                             | 65 ++++++++++---------
 privacy/index.html                            | 29 +++++----
 pt_BR/contact/index.html                      | 65 ++++++++++---------
 pt_BR/fdroid/index.html                       | 65 ++++++++++---------
 pt_BR/index.html                              | 43 ++++++------
 pt_BR/invitation/index.html                   | 65 ++++++++++---------
 pt_BR/messaging/index.html                    | 65 ++++++++++---------
 pt_BR/old/index.html                          | 65 ++++++++++---------
 ro/contact/index.html                         | 65 ++++++++++---------
 ro/fdroid/index.html                          | 65 ++++++++++---------
 ro/index.html                                 | 43 ++++++------
 ro/invitation/index.html                      | 65 ++++++++++---------
 ro/messaging/index.html                       | 65 ++++++++++---------
 ro/old/index.html                             | 65 ++++++++++---------
 ru/contact/index.html                         | 65 ++++++++++---------
 ru/fdroid/index.html                          | 65 ++++++++++---------
 ru/index.html                                 | 43 ++++++------
 ru/invitation/index.html                      | 65 ++++++++++---------
 ru/messaging/index.html                       | 65 ++++++++++---------
 ru/old/index.html                             | 65 ++++++++++---------
 security/index.html                           | 31 +++++----
 token/index.html                              | 29 +++++----
 tr/contact/index.html                         | 65 ++++++++++---------
 tr/fdroid/index.html                          | 65 ++++++++++---------
 tr/index.html                                 | 43 ++++++------
 tr/invitation/index.html                      | 65 ++++++++++---------
 tr/messaging/index.html                       | 65 ++++++++++---------
 tr/old/index.html                             | 65 ++++++++++---------
 transparency/index.html                       | 31 +++++----
 uk/contact/index.html                         | 65 ++++++++++---------
 uk/fdroid/index.html                          | 65 ++++++++++---------
 uk/index.html                                 | 43 ++++++------
 uk/invitation/index.html                      | 65 ++++++++++---------
 uk/messaging/index.html                       | 65 ++++++++++---------
 uk/old/index.html                             | 65 ++++++++++---------
 zh_Hans/contact/index.html                    | 65 ++++++++++---------
 zh_Hans/fdroid/index.html                     | 65 ++++++++++---------
 zh_Hans/index.html                            | 43 ++++++------
 zh_Hans/invitation/index.html                 | 65 ++++++++++---------
 zh_Hans/messaging/index.html                  | 65 ++++++++++---------
 zh_Hans/old/index.html                        | 65 ++++++++++---------
 zh_Hant/contact/index.html                    | 65 ++++++++++---------
 zh_Hant/fdroid/index.html                     | 65 ++++++++++---------
 zh_Hant/index.html                            | 43 ++++++------
 zh_Hant/invitation/index.html                 | 65 ++++++++++---------
 zh_Hant/messaging/index.html                  | 65 ++++++++++---------
 zh_Hant/old/index.html                        | 65 ++++++++++---------
 246 files changed, 6642 insertions(+), 5412 deletions(-)

diff --git a/about/index.html b/about/index.html
index eb1ca34c3f..65cb882c81 100644
--- a/about/index.html
+++ b/about/index.html
@@ -230,6 +230,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -299,41 +305,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ar/contact/index.html b/ar/contact/index.html
index a0a8bcf572..c1d645d5df 100644
--- a/ar/contact/index.html
+++ b/ar/contact/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ar/fdroid/index.html b/ar/fdroid/index.html
index 68ca2267a5..68b0ba0e42 100644
--- a/ar/fdroid/index.html
+++ b/ar/fdroid/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ar/index.html b/ar/index.html
index 8d0b5e27f9..fc7eff00e5 100644
--- a/ar/index.html
+++ b/ar/index.html
@@ -260,6 +260,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -385,7 +391,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -393,7 +399,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -401,7 +407,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -464,41 +470,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ar/invitation/index.html b/ar/invitation/index.html
index 9b1039844f..305ba09729 100644
--- a/ar/invitation/index.html
+++ b/ar/invitation/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ar/messaging/index.html b/ar/messaging/index.html
index 53a2ce2aa2..ccc760a35c 100644
--- a/ar/messaging/index.html
+++ b/ar/messaging/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ar/old/index.html b/ar/old/index.html
index 9ff859197a..6d6acb61ea 100644
--- a/ar/old/index.html
+++ b/ar/old/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -327,7 +333,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -335,7 +341,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -343,7 +349,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -359,7 +365,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -367,7 +373,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -375,7 +381,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -383,7 +389,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -391,7 +397,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -399,7 +405,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -407,7 +413,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -415,7 +421,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -431,7 +437,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -439,7 +445,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -447,7 +453,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -455,7 +461,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -465,7 +471,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -506,41 +512,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/bg/contact/index.html b/bg/contact/index.html
index 78cb9682a1..d87b8ba3e2 100644
--- a/bg/contact/index.html
+++ b/bg/contact/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/bg/fdroid/index.html b/bg/fdroid/index.html
index f278e267f9..ec53c7f3a4 100644
--- a/bg/fdroid/index.html
+++ b/bg/fdroid/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/bg/index.html b/bg/index.html
index 3060bf8745..c37496b431 100644
--- a/bg/index.html
+++ b/bg/index.html
@@ -256,6 +256,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -342,7 +348,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -376,7 +382,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -384,7 +390,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -392,7 +398,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -414,7 +420,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -455,41 +461,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/bg/invitation/index.html b/bg/invitation/index.html
index 85cfe864fa..b56c6d0338 100644
--- a/bg/invitation/index.html
+++ b/bg/invitation/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/bg/messaging/index.html b/bg/messaging/index.html
index 68fc013a72..c2f5792fae 100644
--- a/bg/messaging/index.html
+++ b/bg/messaging/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/bg/old/index.html b/bg/old/index.html
index 21a50d60af..d782186e57 100644
--- a/bg/old/index.html
+++ b/bg/old/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -318,7 +324,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -326,7 +332,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -334,7 +340,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -342,7 +348,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -350,7 +356,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -358,7 +364,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -366,7 +372,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -374,7 +380,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -382,7 +388,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -390,7 +396,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -398,7 +404,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -406,7 +412,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -414,7 +420,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -422,7 +428,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -430,7 +436,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -438,7 +444,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -446,7 +452,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -456,7 +462,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -497,41 +503,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20201022-simplex-chat.html b/blog/20201022-simplex-chat.html
index feef735b7e..d07ed1281b 100644
--- a/blog/20201022-simplex-chat.html
+++ b/blog/20201022-simplex-chat.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20210512-simplex-chat-terminal-ui.html b/blog/20210512-simplex-chat-terminal-ui.html
index 1bf14a6345..619113d1e0 100644
--- a/blog/20210512-simplex-chat-terminal-ui.html
+++ b/blog/20210512-simplex-chat-terminal-ui.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20210914-simplex-chat-v0.4-released.html b/blog/20210914-simplex-chat-v0.4-released.html
index b806257bfd..099d959498 100644
--- a/blog/20210914-simplex-chat-v0.4-released.html
+++ b/blog/20210914-simplex-chat-v0.4-released.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20211208-simplex-chat-v0.5-released.html b/blog/20211208-simplex-chat-v0.5-released.html
index 1382bf0466..9cc37f4194 100644
--- a/blog/20211208-simplex-chat-v0.5-released.html
+++ b/blog/20211208-simplex-chat-v0.5-released.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20220112-simplex-chat-v1-released.html b/blog/20220112-simplex-chat-v1-released.html
index 80c2bf09be..523fdfc86f 100644
--- a/blog/20220112-simplex-chat-v1-released.html
+++ b/blog/20220112-simplex-chat-v1-released.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20220214-simplex-chat-ios-public-beta.html b/blog/20220214-simplex-chat-ios-public-beta.html
index d0df542784..8e3b2388ba 100644
--- a/blog/20220214-simplex-chat-ios-public-beta.html
+++ b/blog/20220214-simplex-chat-ios-public-beta.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20220308-simplex-chat-mobile-apps.html b/blog/20220308-simplex-chat-mobile-apps.html
index c91c7bd073..49a0f42ab1 100644
--- a/blog/20220308-simplex-chat-mobile-apps.html
+++ b/blog/20220308-simplex-chat-mobile-apps.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20220404-simplex-chat-instant-notifications.html b/blog/20220404-simplex-chat-instant-notifications.html
index fd0711f99d..6844cb3031 100644
--- a/blog/20220404-simplex-chat-instant-notifications.html
+++ b/blog/20220404-simplex-chat-instant-notifications.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20220511-simplex-chat-v2-images-files.html b/blog/20220511-simplex-chat-v2-images-files.html
index bcfff4378c..daf8e83f34 100644
--- a/blog/20220511-simplex-chat-v2-images-files.html
+++ b/blog/20220511-simplex-chat-v2-images-files.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20220524-simplex-chat-better-privacy.html b/blog/20220524-simplex-chat-better-privacy.html
index bbd37fbf3d..e0af3c0a6e 100644
--- a/blog/20220524-simplex-chat-better-privacy.html
+++ b/blog/20220524-simplex-chat-better-privacy.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20220604-simplex-chat-new-privacy-security-settings.html b/blog/20220604-simplex-chat-new-privacy-security-settings.html
index 6451698c4e..e5b8c00547 100644
--- a/blog/20220604-simplex-chat-new-privacy-security-settings.html
+++ b/blog/20220604-simplex-chat-new-privacy-security-settings.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20220711-simplex-chat-v3-released-ios-notifications-audio-video-calls-database-export-import-protocol-improvements.html b/blog/20220711-simplex-chat-v3-released-ios-notifications-audio-video-calls-database-export-import-protocol-improvements.html
index 1d28411ace..6f39502737 100644
--- a/blog/20220711-simplex-chat-v3-released-ios-notifications-audio-video-calls-database-export-import-protocol-improvements.html
+++ b/blog/20220711-simplex-chat-v3-released-ios-notifications-audio-video-calls-database-export-import-protocol-improvements.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20220723-simplex-chat-v3.1-tor-groups-efficiency.html b/blog/20220723-simplex-chat-v3.1-tor-groups-efficiency.html
index 2cf1be102b..7f7feba94b 100644
--- a/blog/20220723-simplex-chat-v3.1-tor-groups-efficiency.html
+++ b/blog/20220723-simplex-chat-v3.1-tor-groups-efficiency.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20220808-simplex-chat-v3.1-chat-groups.html b/blog/20220808-simplex-chat-v3.1-chat-groups.html
index 812c97efa2..b61867c841 100644
--- a/blog/20220808-simplex-chat-v3.1-chat-groups.html
+++ b/blog/20220808-simplex-chat-v3.1-chat-groups.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20220901-simplex-chat-v3.2-incognito-mode.html b/blog/20220901-simplex-chat-v3.2-incognito-mode.html
index b2124a1703..74ce117fbb 100644
--- a/blog/20220901-simplex-chat-v3.2-incognito-mode.html
+++ b/blog/20220901-simplex-chat-v3.2-incognito-mode.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20220928-simplex-chat-v4-encrypted-database.html b/blog/20220928-simplex-chat-v4-encrypted-database.html
index 6e1171605d..865806b0ce 100644
--- a/blog/20220928-simplex-chat-v4-encrypted-database.html
+++ b/blog/20220928-simplex-chat-v4-encrypted-database.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20221108-simplex-chat-v4.2-security-audit-new-website.html b/blog/20221108-simplex-chat-v4.2-security-audit-new-website.html
index b0b0bc8d0a..2908c6fd78 100644
--- a/blog/20221108-simplex-chat-v4.2-security-audit-new-website.html
+++ b/blog/20221108-simplex-chat-v4.2-security-audit-new-website.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20221206-simplex-chat-v4.3-voice-messages.html b/blog/20221206-simplex-chat-v4.3-voice-messages.html
index fb8d147543..59586885e4 100644
--- a/blog/20221206-simplex-chat-v4.3-voice-messages.html
+++ b/blog/20221206-simplex-chat-v4.3-voice-messages.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20230103-simplex-chat-v4.4-disappearing-messages.html b/blog/20230103-simplex-chat-v4.4-disappearing-messages.html
index 27f4f05a0b..614d29a745 100644
--- a/blog/20230103-simplex-chat-v4.4-disappearing-messages.html
+++ b/blog/20230103-simplex-chat-v4.4-disappearing-messages.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20230204-simplex-chat-v4-5-user-chat-profiles.html b/blog/20230204-simplex-chat-v4-5-user-chat-profiles.html
index 8ecb4e4113..e146c21fab 100644
--- a/blog/20230204-simplex-chat-v4-5-user-chat-profiles.html
+++ b/blog/20230204-simplex-chat-v4-5-user-chat-profiles.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20230301-simplex-file-transfer-protocol.html b/blog/20230301-simplex-file-transfer-protocol.html
index e496cd2ead..5ab2f57f56 100644
--- a/blog/20230301-simplex-file-transfer-protocol.html
+++ b/blog/20230301-simplex-file-transfer-protocol.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20230328-simplex-chat-v4-6-hidden-profiles.html b/blog/20230328-simplex-chat-v4-6-hidden-profiles.html
index 199a47c692..248fe90001 100644
--- a/blog/20230328-simplex-chat-v4-6-hidden-profiles.html
+++ b/blog/20230328-simplex-chat-v4-6-hidden-profiles.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20230422-simplex-chat-vision-funding-v5-videos-files-passcode.html b/blog/20230422-simplex-chat-vision-funding-v5-videos-files-passcode.html
index 17676ebb12..ab0c7f2660 100644
--- a/blog/20230422-simplex-chat-vision-funding-v5-videos-files-passcode.html
+++ b/blog/20230422-simplex-chat-vision-funding-v5-videos-files-passcode.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20230523-simplex-chat-v5-1-message-reactions-self-destruct-passcode.html b/blog/20230523-simplex-chat-v5-1-message-reactions-self-destruct-passcode.html
index 8e6ce31d52..a3bf3716a5 100644
--- a/blog/20230523-simplex-chat-v5-1-message-reactions-self-destruct-passcode.html
+++ b/blog/20230523-simplex-chat-v5-1-message-reactions-self-destruct-passcode.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20230722-simplex-chat-v5-2-message-delivery-receipts.html b/blog/20230722-simplex-chat-v5-2-message-delivery-receipts.html
index e293bb44f7..161e5ea855 100644
--- a/blog/20230722-simplex-chat-v5-2-message-delivery-receipts.html
+++ b/blog/20230722-simplex-chat-v5-2-message-delivery-receipts.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20230925-simplex-chat-v5-3-desktop-app-local-file-encryption-directory-service.html b/blog/20230925-simplex-chat-v5-3-desktop-app-local-file-encryption-directory-service.html
index d070e9cd8c..13ce51f693 100644
--- a/blog/20230925-simplex-chat-v5-3-desktop-app-local-file-encryption-directory-service.html
+++ b/blog/20230925-simplex-chat-v5-3-desktop-app-local-file-encryption-directory-service.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20231125-simplex-chat-v5-4-link-mobile-desktop-quantum-resistant-better-groups.html b/blog/20231125-simplex-chat-v5-4-link-mobile-desktop-quantum-resistant-better-groups.html
index a8a1903f8c..8828f5f251 100644
--- a/blog/20231125-simplex-chat-v5-4-link-mobile-desktop-quantum-resistant-better-groups.html
+++ b/blog/20231125-simplex-chat-v5-4-link-mobile-desktop-quantum-resistant-better-groups.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20240124-simplex-chat-infrastructure-costs-v5-5-simplex-ux-private-notes-group-history.html b/blog/20240124-simplex-chat-infrastructure-costs-v5-5-simplex-ux-private-notes-group-history.html
index 9d65e881d0..f7d399641b 100644
--- a/blog/20240124-simplex-chat-infrastructure-costs-v5-5-simplex-ux-private-notes-group-history.html
+++ b/blog/20240124-simplex-chat-infrastructure-costs-v5-5-simplex-ux-private-notes-group-history.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20240314-simplex-chat-v5-6-quantum-resistance-signal-double-ratchet-algorithm.html b/blog/20240314-simplex-chat-v5-6-quantum-resistance-signal-double-ratchet-algorithm.html
index 91d4bf1561..3fbf6f0de4 100644
--- a/blog/20240314-simplex-chat-v5-6-quantum-resistance-signal-double-ratchet-algorithm.html
+++ b/blog/20240314-simplex-chat-v5-6-quantum-resistance-signal-double-ratchet-algorithm.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20240323-simplex-network-privacy-non-profit-v5-6-quantum-resistant-e2e-encryption-simple-migration.html b/blog/20240323-simplex-network-privacy-non-profit-v5-6-quantum-resistant-e2e-encryption-simple-migration.html
index a0ba8258d5..b3eaad2576 100644
--- a/blog/20240323-simplex-network-privacy-non-profit-v5-6-quantum-resistant-e2e-encryption-simple-migration.html
+++ b/blog/20240323-simplex-network-privacy-non-profit-v5-6-quantum-resistant-e2e-encryption-simple-migration.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20240404-why-i-joined-simplex-chat-esraa-al-shafei.html b/blog/20240404-why-i-joined-simplex-chat-esraa-al-shafei.html
index f35ef934cc..182ae5db6f 100644
--- a/blog/20240404-why-i-joined-simplex-chat-esraa-al-shafei.html
+++ b/blog/20240404-why-i-joined-simplex-chat-esraa-al-shafei.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20240416-dangers-of-metadata-in-messengers.html b/blog/20240416-dangers-of-metadata-in-messengers.html
index f1f6686047..e6272a5537 100644
--- a/blog/20240416-dangers-of-metadata-in-messengers.html
+++ b/blog/20240416-dangers-of-metadata-in-messengers.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20240426-simplex-legally-binding-transparency-v5-7-better-user-experience.html b/blog/20240426-simplex-legally-binding-transparency-v5-7-better-user-experience.html
index 12e97e8192..908bf42375 100644
--- a/blog/20240426-simplex-legally-binding-transparency-v5-7-better-user-experience.html
+++ b/blog/20240426-simplex-legally-binding-transparency-v5-7-better-user-experience.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20240516-simplex-redefining-privacy-hard-choices.html b/blog/20240516-simplex-redefining-privacy-hard-choices.html
index 17e7a67895..a7af48fbb2 100644
--- a/blog/20240516-simplex-redefining-privacy-hard-choices.html
+++ b/blog/20240516-simplex-redefining-privacy-hard-choices.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20240601-protecting-children-safety-requires-e2e-encryption.html b/blog/20240601-protecting-children-safety-requires-e2e-encryption.html
index b28c9ba8f0..b26e0600f0 100644
--- a/blog/20240601-protecting-children-safety-requires-e2e-encryption.html
+++ b/blog/20240601-protecting-children-safety-requires-e2e-encryption.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20240604-simplex-chat-v5.8-private-message-routing-chat-themes.html b/blog/20240604-simplex-chat-v5.8-private-message-routing-chat-themes.html
index a27cc7ffbb..7b67352532 100644
--- a/blog/20240604-simplex-chat-v5.8-private-message-routing-chat-themes.html
+++ b/blog/20240604-simplex-chat-v5.8-private-message-routing-chat-themes.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20240704-future-of-privacy-enforcing-privacy-standards.html b/blog/20240704-future-of-privacy-enforcing-privacy-standards.html
index 1663971753..cee7536601 100644
--- a/blog/20240704-future-of-privacy-enforcing-privacy-standards.html
+++ b/blog/20240704-future-of-privacy-enforcing-privacy-standards.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20240814-simplex-chat-vision-funding-v6-private-routing-new-user-experience.html b/blog/20240814-simplex-chat-vision-funding-v6-private-routing-new-user-experience.html
index 42ec1e6346..bd2253a7f8 100644
--- a/blog/20240814-simplex-chat-vision-funding-v6-private-routing-new-user-experience.html
+++ b/blog/20240814-simplex-chat-vision-funding-v6-private-routing-new-user-experience.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20241014-simplex-network-v6-1-security-review-better-calls-user-experience.html b/blog/20241014-simplex-network-v6-1-security-review-better-calls-user-experience.html
index 6f8450c3ce..cc5596c879 100644
--- a/blog/20241014-simplex-network-v6-1-security-review-better-calls-user-experience.html
+++ b/blog/20241014-simplex-network-v6-1-security-review-better-calls-user-experience.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20241016-wired-attack-on-privacy.html b/blog/20241016-wired-attack-on-privacy.html
index a2ef1033dd..0f9dacf3b2 100644
--- a/blog/20241016-wired-attack-on-privacy.html
+++ b/blog/20241016-wired-attack-on-privacy.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20241125-servers-operated-by-flux-true-privacy-and-decentralization-for-all-users.html b/blog/20241125-servers-operated-by-flux-true-privacy-and-decentralization-for-all-users.html
index ecfa5e81e1..847b2d1b93 100644
--- a/blog/20241125-servers-operated-by-flux-true-privacy-and-decentralization-for-all-users.html
+++ b/blog/20241125-servers-operated-by-flux-true-privacy-and-decentralization-for-all-users.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20241210-simplex-network-v6-2-servers-by-flux-business-chats.html b/blog/20241210-simplex-network-v6-2-servers-by-flux-business-chats.html
index 6270d9dd1d..f68d5a89d9 100644
--- a/blog/20241210-simplex-network-v6-2-servers-by-flux-business-chats.html
+++ b/blog/20241210-simplex-network-v6-2-servers-by-flux-business-chats.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20241218-oppose-digital-ids-they-break-law-lead-to-mass-scale-surveillance.html b/blog/20241218-oppose-digital-ids-they-break-law-lead-to-mass-scale-surveillance.html
index 04d0cb71e5..8d11325bc9 100644
--- a/blog/20241218-oppose-digital-ids-they-break-law-lead-to-mass-scale-surveillance.html
+++ b/blog/20241218-oppose-digital-ids-they-break-law-lead-to-mass-scale-surveillance.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20250114-simplex-network-large-groups-privacy-preserving-content-moderation.html b/blog/20250114-simplex-network-large-groups-privacy-preserving-content-moderation.html
index b52f38902b..be9b6927b2 100644
--- a/blog/20250114-simplex-network-large-groups-privacy-preserving-content-moderation.html
+++ b/blog/20250114-simplex-network-large-groups-privacy-preserving-content-moderation.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20250308-simplex-chat-v6-3-new-user-experience-safety-in-public-groups.html b/blog/20250308-simplex-chat-v6-3-new-user-experience-safety-in-public-groups.html
index 4f59c7d194..8ce4d29b79 100644
--- a/blog/20250308-simplex-chat-v6-3-new-user-experience-safety-in-public-groups.html
+++ b/blog/20250308-simplex-chat-v6-3-new-user-experience-safety-in-public-groups.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20250703-simplex-network-protocol-extension-for-securely-connecting-people.html b/blog/20250703-simplex-network-protocol-extension-for-securely-connecting-people.html
index 9b26e09e3d..6894a5c4cc 100644
--- a/blog/20250703-simplex-network-protocol-extension-for-securely-connecting-people.html
+++ b/blog/20250703-simplex-network-protocol-extension-for-securely-connecting-people.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/20250729-simplex-chat-v6-4-1-welcome-contacts-protect-groups-app-security.html b/blog/20250729-simplex-chat-v6-4-1-welcome-contacts-protect-groups-app-security.html
index 5983c0416c..96f86a1e03 100644
--- a/blog/20250729-simplex-chat-v6-4-1-welcome-contacts-protect-groups-app-security.html
+++ b/blog/20250729-simplex-chat-v6-4-1-welcome-contacts-protect-groups-app-security.html
@@ -237,6 +237,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -306,41 +312,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/blog/index.html b/blog/index.html
index a3e42653ea..f4ede967e4 100644
--- a/blog/index.html
+++ b/blog/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -309,41 +315,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/contact/index.html b/contact/index.html
index 57c56562a2..28653c7457 100644
--- a/contact/index.html
+++ b/contact/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/cs/contact/index.html b/cs/contact/index.html
index 445570e740..1b31dc9e0b 100644
--- a/cs/contact/index.html
+++ b/cs/contact/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/cs/fdroid/index.html b/cs/fdroid/index.html
index 961caaef69..e26d9d5f14 100644
--- a/cs/fdroid/index.html
+++ b/cs/fdroid/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/cs/index.html b/cs/index.html
index 3134193659..c92b6201c9 100644
--- a/cs/index.html
+++ b/cs/index.html
@@ -260,6 +260,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -385,7 +391,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -393,7 +399,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -401,7 +407,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -464,41 +470,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/cs/invitation/index.html b/cs/invitation/index.html
index 1fcce71116..6353c8730c 100644
--- a/cs/invitation/index.html
+++ b/cs/invitation/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/cs/messaging/index.html b/cs/messaging/index.html
index 24178a5f42..b713af8931 100644
--- a/cs/messaging/index.html
+++ b/cs/messaging/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/cs/old/index.html b/cs/old/index.html
index 83175d4629..958205bf16 100644
--- a/cs/old/index.html
+++ b/cs/old/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -327,7 +333,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -335,7 +341,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -343,7 +349,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -359,7 +365,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -367,7 +373,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -375,7 +381,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -383,7 +389,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -391,7 +397,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -399,7 +405,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -407,7 +413,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -415,7 +421,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -431,7 +437,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -439,7 +445,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -447,7 +453,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -455,7 +461,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -465,7 +471,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -506,41 +512,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/de/contact/index.html b/de/contact/index.html
index 4d759931fb..57ac6a32f7 100644
--- a/de/contact/index.html
+++ b/de/contact/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/de/fdroid/index.html b/de/fdroid/index.html
index 3a7612a805..b524fe982e 100644
--- a/de/fdroid/index.html
+++ b/de/fdroid/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/de/index.html b/de/index.html
index 2feea3ef57..b58d3d3f8e 100644
--- a/de/index.html
+++ b/de/index.html
@@ -260,6 +260,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -385,7 +391,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -393,7 +399,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -401,7 +407,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -464,41 +470,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/de/invitation/index.html b/de/invitation/index.html
index c94306e376..422c184653 100644
--- a/de/invitation/index.html
+++ b/de/invitation/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/de/messaging/index.html b/de/messaging/index.html
index b2e4d4b531..3a72d8d779 100644
--- a/de/messaging/index.html
+++ b/de/messaging/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/de/old/index.html b/de/old/index.html
index 5cb9a8639d..0820d5787f 100644
--- a/de/old/index.html
+++ b/de/old/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -327,7 +333,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -335,7 +341,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -343,7 +349,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -359,7 +365,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -367,7 +373,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -375,7 +381,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -383,7 +389,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -391,7 +397,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -399,7 +405,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -407,7 +413,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -415,7 +421,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -431,7 +437,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -439,7 +445,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -447,7 +453,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -455,7 +461,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -465,7 +471,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -506,41 +512,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/directory/index.html b/directory/index.html
index c87ccc6bd1..11c2d1673f 100644
--- a/directory/index.html
+++ b/directory/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -309,41 +315,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/android.html b/docs/android.html
index 2e53f525f9..d88dcd3288 100644
--- a/docs/android.html
+++ b/docs/android.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/android.html" class="flag-anchor">
+                                    <a href="/docs/android.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/android.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/android.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/android.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/android.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/android.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/android.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/business.html b/docs/business.html
index a4eb033b9a..a10caa45da 100644
--- a/docs/business.html
+++ b/docs/business.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/business.html" class="flag-anchor">
+                                    <a href="/docs/business.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -401,41 +407,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/cli.html b/docs/cli.html
index 2c43163afb..b42e68e4bf 100644
--- a/docs/cli.html
+++ b/docs/cli.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/cli.html" class="flag-anchor">
+                                    <a href="/docs/cli.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/cli.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/cli.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/cli.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/cli.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/cli.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/cli.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/code_of_conduct.html b/docs/code_of_conduct.html
index a375e5f210..b035e72041 100644
--- a/docs/code_of_conduct.html
+++ b/docs/code_of_conduct.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/code_of_conduct.html" class="flag-anchor">
+                                    <a href="/docs/code_of_conduct.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -401,41 +407,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/contributing.html b/docs/contributing.html
index e97ebc55a1..885ce301cb 100644
--- a/docs/contributing.html
+++ b/docs/contributing.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/contributing.html" class="flag-anchor">
+                                    <a href="/docs/contributing.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/contributing.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/contributing.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/contributing.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/contributing.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/contributing.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/contributing.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/directory.html b/docs/directory.html
index eba11111ea..9e7a541ea2 100644
--- a/docs/directory.html
+++ b/docs/directory.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -300,41 +306,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/glossary.html b/docs/glossary.html
index 601f3b4566..2203fdb2b1 100644
--- a/docs/glossary.html
+++ b/docs/glossary.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/glossary.html" class="flag-anchor">
+                                    <a href="/docs/glossary.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -401,41 +407,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/guide/app-settings.html b/docs/guide/app-settings.html
index 082c8c1b29..9484a71998 100644
--- a/docs/guide/app-settings.html
+++ b/docs/guide/app-settings.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/guide/app-settings.html" class="flag-anchor">
+                                    <a href="/docs/guide/app-settings.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -401,41 +407,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/guide/audio-video-calls.html b/docs/guide/audio-video-calls.html
index c52ba7f179..32a764352a 100644
--- a/docs/guide/audio-video-calls.html
+++ b/docs/guide/audio-video-calls.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/guide/audio-video-calls.html" class="flag-anchor">
+                                    <a href="/docs/guide/audio-video-calls.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -401,41 +407,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/guide/chat-profiles.html b/docs/guide/chat-profiles.html
index e4970c28fe..623bb27494 100644
--- a/docs/guide/chat-profiles.html
+++ b/docs/guide/chat-profiles.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/guide/chat-profiles.html" class="flag-anchor">
+                                    <a href="/docs/guide/chat-profiles.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -401,41 +407,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/guide/making-connections.html b/docs/guide/making-connections.html
index 67aedc9aee..39e6203f40 100644
--- a/docs/guide/making-connections.html
+++ b/docs/guide/making-connections.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/guide/making-connections.html" class="flag-anchor">
+                                    <a href="/docs/guide/making-connections.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -401,41 +407,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/guide/managing-data.html b/docs/guide/managing-data.html
index 73ee2422b0..8de46e92ba 100644
--- a/docs/guide/managing-data.html
+++ b/docs/guide/managing-data.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/guide/managing-data.html" class="flag-anchor">
+                                    <a href="/docs/guide/managing-data.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -401,41 +407,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/guide/privacy-security.html b/docs/guide/privacy-security.html
index 4917ba6bbe..58d083f242 100644
--- a/docs/guide/privacy-security.html
+++ b/docs/guide/privacy-security.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -300,41 +306,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/guide/readme.html b/docs/guide/readme.html
index 003af53873..922f07d6b4 100644
--- a/docs/guide/readme.html
+++ b/docs/guide/readme.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/guide/readme.html" class="flag-anchor">
+                                    <a href="/docs/guide/readme.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -401,41 +407,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/guide/secret-groups.html b/docs/guide/secret-groups.html
index 043f9229d0..c03107f626 100644
--- a/docs/guide/secret-groups.html
+++ b/docs/guide/secret-groups.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/guide/secret-groups.html" class="flag-anchor">
+                                    <a href="/docs/guide/secret-groups.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -401,41 +407,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/guide/send-messages.html b/docs/guide/send-messages.html
index 693979da2e..f739eaddb4 100644
--- a/docs/guide/send-messages.html
+++ b/docs/guide/send-messages.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/guide/send-messages.html" class="flag-anchor">
+                                    <a href="/docs/guide/send-messages.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -401,41 +407,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/cs/android.html b/docs/lang/cs/android.html
index a80f7f4f7d..07f3ef0671 100644
--- a/docs/lang/cs/android.html
+++ b/docs/lang/cs/android.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/android.html" class="flag-anchor">
+                                    <a href="/docs/android.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/android.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/android.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/android.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/android.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/android.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/android.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/cs/cli.html b/docs/lang/cs/cli.html
index 77f5885ab5..a9bc72e306 100644
--- a/docs/lang/cs/cli.html
+++ b/docs/lang/cs/cli.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/cli.html" class="flag-anchor">
+                                    <a href="/docs/cli.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/cli.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/cli.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/cli.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/cli.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/cli.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/cli.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/cs/contributing.html b/docs/lang/cs/contributing.html
index 39f5def6e9..024ba64a3a 100644
--- a/docs/lang/cs/contributing.html
+++ b/docs/lang/cs/contributing.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/contributing.html" class="flag-anchor">
+                                    <a href="/docs/contributing.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/contributing.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/contributing.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/contributing.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/contributing.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/contributing.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/contributing.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/cs/server.html b/docs/lang/cs/server.html
index 44c3761609..b40722a704 100644
--- a/docs/lang/cs/server.html
+++ b/docs/lang/cs/server.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/server.html" class="flag-anchor">
+                                    <a href="/docs/server.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/server.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/server.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/server.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/server.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/server.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/server.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/cs/simplex.html b/docs/lang/cs/simplex.html
index 4bb26055c0..1ee1429a6b 100644
--- a/docs/lang/cs/simplex.html
+++ b/docs/lang/cs/simplex.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/simplex.html" class="flag-anchor">
+                                    <a href="/docs/simplex.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/simplex.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/simplex.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/simplex.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/simplex.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/simplex.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/simplex.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/cs/translations.html b/docs/lang/cs/translations.html
index 446459d9b8..d99050a2a7 100644
--- a/docs/lang/cs/translations.html
+++ b/docs/lang/cs/translations.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/translations.html" class="flag-anchor">
+                                    <a href="/docs/translations.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/translations.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/translations.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/translations.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/translations.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/translations.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/translations.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/cs/webrtc.html b/docs/lang/cs/webrtc.html
index 5f04944706..f1511f2b75 100644
--- a/docs/lang/cs/webrtc.html
+++ b/docs/lang/cs/webrtc.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/webrtc.html" class="flag-anchor">
+                                    <a href="/docs/webrtc.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/webrtc.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/webrtc.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/webrtc.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/webrtc.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/webrtc.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/webrtc.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/fr/android.html b/docs/lang/fr/android.html
index 45a4d29e8a..053531d8be 100644
--- a/docs/lang/fr/android.html
+++ b/docs/lang/fr/android.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/android.html" class="flag-anchor">
+                                    <a href="/docs/android.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/android.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/android.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/android.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/android.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/android.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/android.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/fr/cli.html b/docs/lang/fr/cli.html
index c27e30a4e8..5f56ef2b07 100644
--- a/docs/lang/fr/cli.html
+++ b/docs/lang/fr/cli.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/cli.html" class="flag-anchor">
+                                    <a href="/docs/cli.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/cli.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/cli.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/cli.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/cli.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/cli.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/cli.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/fr/contributing.html b/docs/lang/fr/contributing.html
index a62f3d9125..907f18b001 100644
--- a/docs/lang/fr/contributing.html
+++ b/docs/lang/fr/contributing.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/contributing.html" class="flag-anchor">
+                                    <a href="/docs/contributing.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/contributing.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/contributing.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/contributing.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/contributing.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/contributing.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/contributing.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/fr/server.html b/docs/lang/fr/server.html
index e3930a37e5..5f7081add5 100644
--- a/docs/lang/fr/server.html
+++ b/docs/lang/fr/server.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/server.html" class="flag-anchor">
+                                    <a href="/docs/server.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/server.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/server.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/server.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/server.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/server.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/server.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/fr/simplex.html b/docs/lang/fr/simplex.html
index e02aaa7c88..46d7f98e54 100644
--- a/docs/lang/fr/simplex.html
+++ b/docs/lang/fr/simplex.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/simplex.html" class="flag-anchor">
+                                    <a href="/docs/simplex.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/simplex.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/simplex.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/simplex.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/simplex.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/simplex.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/simplex.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/fr/translations.html b/docs/lang/fr/translations.html
index 9dd5b519f8..64389c7990 100644
--- a/docs/lang/fr/translations.html
+++ b/docs/lang/fr/translations.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/translations.html" class="flag-anchor">
+                                    <a href="/docs/translations.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/translations.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/translations.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/translations.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/translations.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/translations.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/translations.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/fr/webrtc.html b/docs/lang/fr/webrtc.html
index 9595c7de50..fcaa19946c 100644
--- a/docs/lang/fr/webrtc.html
+++ b/docs/lang/fr/webrtc.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/webrtc.html" class="flag-anchor">
+                                    <a href="/docs/webrtc.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/webrtc.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/webrtc.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/webrtc.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/webrtc.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/webrtc.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/webrtc.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/pl/android.html b/docs/lang/pl/android.html
index 7636cef49b..7d23445286 100644
--- a/docs/lang/pl/android.html
+++ b/docs/lang/pl/android.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/android.html" class="flag-anchor">
+                                    <a href="/docs/android.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/android.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/android.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/android.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/android.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/android.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/android.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/pl/cli.html b/docs/lang/pl/cli.html
index c2698ca926..cad3213f6e 100644
--- a/docs/lang/pl/cli.html
+++ b/docs/lang/pl/cli.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/cli.html" class="flag-anchor">
+                                    <a href="/docs/cli.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/cli.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/cli.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/cli.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/cli.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/cli.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/cli.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/pl/contributing.html b/docs/lang/pl/contributing.html
index e5a0ab3d61..41c1f004ad 100644
--- a/docs/lang/pl/contributing.html
+++ b/docs/lang/pl/contributing.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/contributing.html" class="flag-anchor">
+                                    <a href="/docs/contributing.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/contributing.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/contributing.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/contributing.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/contributing.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/contributing.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/contributing.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/pl/server.html b/docs/lang/pl/server.html
index 7aab62819a..d5713fefcf 100644
--- a/docs/lang/pl/server.html
+++ b/docs/lang/pl/server.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/server.html" class="flag-anchor">
+                                    <a href="/docs/server.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/server.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/server.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/server.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/server.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/server.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/server.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/pl/simplex.html b/docs/lang/pl/simplex.html
index 0ad245214d..2d8c1fc0b1 100644
--- a/docs/lang/pl/simplex.html
+++ b/docs/lang/pl/simplex.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/simplex.html" class="flag-anchor">
+                                    <a href="/docs/simplex.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/simplex.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/simplex.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/simplex.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/simplex.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/simplex.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/simplex.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/pl/translations.html b/docs/lang/pl/translations.html
index 40596edbef..30a0e5f157 100644
--- a/docs/lang/pl/translations.html
+++ b/docs/lang/pl/translations.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/translations.html" class="flag-anchor">
+                                    <a href="/docs/translations.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/translations.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/translations.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/translations.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/translations.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/translations.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/translations.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/lang/pl/webrtc.html b/docs/lang/pl/webrtc.html
index 527162b4b7..8c691995cd 100644
--- a/docs/lang/pl/webrtc.html
+++ b/docs/lang/pl/webrtc.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/webrtc.html" class="flag-anchor">
+                                    <a href="/docs/webrtc.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/webrtc.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/webrtc.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/webrtc.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/webrtc.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/webrtc.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/webrtc.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/protocol/simplex-chat.html b/docs/protocol/simplex-chat.html
index 7bddefd04f..fa4b0ae68f 100644
--- a/docs/protocol/simplex-chat.html
+++ b/docs/protocol/simplex-chat.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/protocol/simplex-chat.html" class="flag-anchor">
+                                    <a href="/docs/protocol/simplex-chat.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -401,41 +407,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/server.html b/docs/server.html
index 8736f5eb1e..11e77aec4b 100644
--- a/docs/server.html
+++ b/docs/server.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/server.html" class="flag-anchor">
+                                    <a href="/docs/server.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/server.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/server.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/server.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/server.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/server.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/server.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/simplex.html b/docs/simplex.html
index 90f83141f4..b940a55e70 100644
--- a/docs/simplex.html
+++ b/docs/simplex.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/simplex.html" class="flag-anchor">
+                                    <a href="/docs/simplex.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/simplex.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/simplex.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/simplex.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/simplex.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/simplex.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/simplex.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/themes.html b/docs/themes.html
index 0aea7e6f95..e394c5e652 100644
--- a/docs/themes.html
+++ b/docs/themes.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/themes.html" class="flag-anchor">
+                                    <a href="/docs/themes.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -401,41 +407,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/trademark.html b/docs/trademark.html
index e9dce17d69..e7177d1528 100644
--- a/docs/trademark.html
+++ b/docs/trademark.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/trademark.html" class="flag-anchor">
+                                    <a href="/docs/trademark.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -401,41 +407,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/translations.html b/docs/translations.html
index f69ab4c817..8486dfa099 100644
--- a/docs/translations.html
+++ b/docs/translations.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/translations.html" class="flag-anchor">
+                                    <a href="/docs/translations.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/translations.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/translations.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/translations.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/translations.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/translations.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/translations.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/webrtc.html b/docs/webrtc.html
index 01aefd747f..e4ab8b36c9 100644
--- a/docs/webrtc.html
+++ b/docs/webrtc.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/webrtc.html" class="flag-anchor">
+                                    <a href="/docs/webrtc.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -373,7 +379,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/cs/webrtc.html" class="flag-anchor">
+                                    <a href="/docs/lang/cs/webrtc.html">
                                         <p>Čeština</p>
                                     </a>
                                 </li>
@@ -427,7 +433,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/fr/webrtc.html" class="flag-anchor">
+                                    <a href="/docs/lang/fr/webrtc.html">
                                         <p>Français</p>
                                     </a>
                                 </li>
@@ -487,7 +493,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/lang/pl/webrtc.html" class="flag-anchor">
+                                    <a href="/docs/lang/pl/webrtc.html">
                                         <p>Polski</p>
                                     </a>
                                 </li>
@@ -539,41 +545,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/docs/xftp-server.html b/docs/xftp-server.html
index 9049747236..e8823405e5 100644
--- a/docs/xftp-server.html
+++ b/docs/xftp-server.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="/docs/xftp-server.html" class="flag-anchor">
+                                    <a href="/docs/xftp-server.html">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -401,41 +407,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/downloads/index.html b/downloads/index.html
index e1514943ea..80a26fda59 100644
--- a/downloads/index.html
+++ b/downloads/index.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="undefined" class="flag-anchor">
+                                    <a href="undefined">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -401,41 +407,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/en/contact/index.html b/en/contact/index.html
index 57c56562a2..28653c7457 100644
--- a/en/contact/index.html
+++ b/en/contact/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/en/fdroid/index.html b/en/fdroid/index.html
index f62ff72de4..20884ff74d 100644
--- a/en/fdroid/index.html
+++ b/en/fdroid/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/en/index.html b/en/index.html
index 1f19047aaf..e03d7b643d 100644
--- a/en/index.html
+++ b/en/index.html
@@ -260,6 +260,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -385,7 +391,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -393,7 +399,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -401,7 +407,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -464,41 +470,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/en/invitation/index.html b/en/invitation/index.html
index 55c729a9cf..0d8a9d3b50 100644
--- a/en/invitation/index.html
+++ b/en/invitation/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/en/messaging/index.html b/en/messaging/index.html
index 5e424a8554..a3ae2bc62d 100644
--- a/en/messaging/index.html
+++ b/en/messaging/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/en/old/index.html b/en/old/index.html
index 63df2a39d6..30e1f4eaff 100644
--- a/en/old/index.html
+++ b/en/old/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -327,7 +333,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -335,7 +341,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -343,7 +349,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -359,7 +365,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -367,7 +373,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -375,7 +381,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -383,7 +389,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -391,7 +397,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -399,7 +405,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -407,7 +413,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -415,7 +421,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -431,7 +437,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -439,7 +445,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -447,7 +453,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -455,7 +461,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -465,7 +471,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -506,41 +512,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/es/contact/index.html b/es/contact/index.html
index 94c2344ae1..1386c6ffeb 100644
--- a/es/contact/index.html
+++ b/es/contact/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/es/fdroid/index.html b/es/fdroid/index.html
index b8f57cede1..c6c5af5203 100644
--- a/es/fdroid/index.html
+++ b/es/fdroid/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/es/index.html b/es/index.html
index 0c98f8ca5a..bc3890eb8e 100644
--- a/es/index.html
+++ b/es/index.html
@@ -260,6 +260,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -385,7 +391,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -393,7 +399,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -401,7 +407,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -464,41 +470,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/es/invitation/index.html b/es/invitation/index.html
index b5ccf89564..4c2734611d 100644
--- a/es/invitation/index.html
+++ b/es/invitation/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/es/messaging/index.html b/es/messaging/index.html
index 888dba682c..fe0c2d1689 100644
--- a/es/messaging/index.html
+++ b/es/messaging/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/es/old/index.html b/es/old/index.html
index 4c54ed27bd..ef30cb20fc 100644
--- a/es/old/index.html
+++ b/es/old/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -327,7 +333,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -335,7 +341,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -343,7 +349,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -359,7 +365,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -367,7 +373,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -375,7 +381,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -383,7 +389,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -391,7 +397,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -399,7 +405,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -407,7 +413,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -415,7 +421,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -431,7 +437,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -439,7 +445,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -447,7 +453,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -455,7 +461,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -465,7 +471,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -506,41 +512,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/fa/contact/index.html b/fa/contact/index.html
index 9ff35a23f4..c8b4dbe0ed 100644
--- a/fa/contact/index.html
+++ b/fa/contact/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/fa/fdroid/index.html b/fa/fdroid/index.html
index 5f33ec8dd0..0c9d91aeba 100644
--- a/fa/fdroid/index.html
+++ b/fa/fdroid/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/fa/index.html b/fa/index.html
index 29bf81ee35..2590504f97 100644
--- a/fa/index.html
+++ b/fa/index.html
@@ -256,6 +256,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -342,7 +348,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -376,7 +382,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -384,7 +390,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -392,7 +398,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -414,7 +420,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -455,41 +461,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/fa/invitation/index.html b/fa/invitation/index.html
index 934d2a9f4e..8bc7748281 100644
--- a/fa/invitation/index.html
+++ b/fa/invitation/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/fa/messaging/index.html b/fa/messaging/index.html
index 60862a37ca..a067d5a6fb 100644
--- a/fa/messaging/index.html
+++ b/fa/messaging/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/fa/old/index.html b/fa/old/index.html
index e56209702e..423f6dbcdc 100644
--- a/fa/old/index.html
+++ b/fa/old/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -318,7 +324,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -326,7 +332,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -334,7 +340,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -342,7 +348,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -350,7 +356,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -358,7 +364,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -366,7 +372,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -374,7 +380,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -382,7 +388,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -390,7 +396,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -398,7 +404,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -406,7 +412,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -414,7 +420,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -422,7 +428,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -430,7 +436,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -438,7 +444,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -446,7 +452,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -456,7 +462,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -497,41 +503,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/faq/index.html b/faq/index.html
index 804d499f1f..6186d98bef 100644
--- a/faq/index.html
+++ b/faq/index.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="undefined" class="flag-anchor">
+                                    <a href="undefined">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -401,41 +407,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/fdroid/index.html b/fdroid/index.html
index f62ff72de4..20884ff74d 100644
--- a/fdroid/index.html
+++ b/fdroid/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/fi/contact/index.html b/fi/contact/index.html
index 8d9649a4e0..6948f2faf3 100644
--- a/fi/contact/index.html
+++ b/fi/contact/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/fi/fdroid/index.html b/fi/fdroid/index.html
index ac553af8a5..c4acf5fe67 100644
--- a/fi/fdroid/index.html
+++ b/fi/fdroid/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/fi/index.html b/fi/index.html
index 6d07d36120..7136d2d947 100644
--- a/fi/index.html
+++ b/fi/index.html
@@ -260,6 +260,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -385,7 +391,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -393,7 +399,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -401,7 +407,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -464,41 +470,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/fi/invitation/index.html b/fi/invitation/index.html
index e129db9e31..309094a230 100644
--- a/fi/invitation/index.html
+++ b/fi/invitation/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/fi/messaging/index.html b/fi/messaging/index.html
index 41b2ba4aac..145f0be379 100644
--- a/fi/messaging/index.html
+++ b/fi/messaging/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/fi/old/index.html b/fi/old/index.html
index f3d39f0577..a95a87f267 100644
--- a/fi/old/index.html
+++ b/fi/old/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -327,7 +333,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -335,7 +341,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -343,7 +349,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -359,7 +365,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -367,7 +373,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -375,7 +381,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -383,7 +389,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -391,7 +397,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -399,7 +405,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -407,7 +413,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -415,7 +421,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -431,7 +437,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -439,7 +445,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -447,7 +453,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -455,7 +461,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -465,7 +471,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -506,41 +512,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/fr/contact/index.html b/fr/contact/index.html
index ba5e6fde16..2c026f598d 100644
--- a/fr/contact/index.html
+++ b/fr/contact/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/fr/fdroid/index.html b/fr/fdroid/index.html
index eadc02f95a..b9dc53245e 100644
--- a/fr/fdroid/index.html
+++ b/fr/fdroid/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/fr/index.html b/fr/index.html
index ce0840d443..9de5a23fe6 100644
--- a/fr/index.html
+++ b/fr/index.html
@@ -260,6 +260,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -385,7 +391,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -393,7 +399,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -401,7 +407,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -464,41 +470,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/fr/invitation/index.html b/fr/invitation/index.html
index 77f4303c85..40fd93e72f 100644
--- a/fr/invitation/index.html
+++ b/fr/invitation/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/fr/messaging/index.html b/fr/messaging/index.html
index b9f91317f2..f585977133 100644
--- a/fr/messaging/index.html
+++ b/fr/messaging/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/fr/old/index.html b/fr/old/index.html
index 406153b2d2..0f3f334b21 100644
--- a/fr/old/index.html
+++ b/fr/old/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -327,7 +333,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -335,7 +341,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -343,7 +349,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -359,7 +365,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -367,7 +373,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -375,7 +381,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -383,7 +389,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -391,7 +397,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -399,7 +405,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -407,7 +413,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -415,7 +421,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -431,7 +437,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -439,7 +445,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -447,7 +453,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -455,7 +461,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -465,7 +471,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -506,41 +512,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/he/contact/index.html b/he/contact/index.html
index 80a3a4a159..d15dfdeddc 100644
--- a/he/contact/index.html
+++ b/he/contact/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/he/fdroid/index.html b/he/fdroid/index.html
index 60d45f62fd..bee03f8295 100644
--- a/he/fdroid/index.html
+++ b/he/fdroid/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/he/index.html b/he/index.html
index 125b00779a..001014d39e 100644
--- a/he/index.html
+++ b/he/index.html
@@ -260,6 +260,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -385,7 +391,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -393,7 +399,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -401,7 +407,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -464,41 +470,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/he/invitation/index.html b/he/invitation/index.html
index c776de0965..d8f55d7f13 100644
--- a/he/invitation/index.html
+++ b/he/invitation/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/he/messaging/index.html b/he/messaging/index.html
index 60693720e2..5981103b42 100644
--- a/he/messaging/index.html
+++ b/he/messaging/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/he/old/index.html b/he/old/index.html
index f316a71723..07f8d429be 100644
--- a/he/old/index.html
+++ b/he/old/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -327,7 +333,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -335,7 +341,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -343,7 +349,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -359,7 +365,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -367,7 +373,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -375,7 +381,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -383,7 +389,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -391,7 +397,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -399,7 +405,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -407,7 +413,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -415,7 +421,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -431,7 +437,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -439,7 +445,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -447,7 +453,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -455,7 +461,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -465,7 +471,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -506,41 +512,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/hu/contact/index.html b/hu/contact/index.html
index 1236ec8be8..8bdb0ae9ef 100644
--- a/hu/contact/index.html
+++ b/hu/contact/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/hu/fdroid/index.html b/hu/fdroid/index.html
index e0cccaae04..4a6f3fbbec 100644
--- a/hu/fdroid/index.html
+++ b/hu/fdroid/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/hu/index.html b/hu/index.html
index 2337015e90..b88e54ac40 100644
--- a/hu/index.html
+++ b/hu/index.html
@@ -260,6 +260,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -385,7 +391,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -393,7 +399,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -401,7 +407,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -464,41 +470,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/hu/invitation/index.html b/hu/invitation/index.html
index 5801ec3247..424b266775 100644
--- a/hu/invitation/index.html
+++ b/hu/invitation/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/hu/messaging/index.html b/hu/messaging/index.html
index d22aae451d..f35e4cda4c 100644
--- a/hu/messaging/index.html
+++ b/hu/messaging/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/hu/old/index.html b/hu/old/index.html
index d5b877091e..d33ff643ae 100644
--- a/hu/old/index.html
+++ b/hu/old/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -327,7 +333,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -335,7 +341,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -343,7 +349,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -359,7 +365,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -367,7 +373,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -375,7 +381,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -383,7 +389,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -391,7 +397,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -399,7 +405,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -407,7 +413,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -415,7 +421,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -431,7 +437,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -439,7 +445,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -447,7 +453,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -455,7 +461,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -465,7 +471,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -506,41 +512,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/id/contact/index.html b/id/contact/index.html
index 389ed989a4..e0de3385c0 100644
--- a/id/contact/index.html
+++ b/id/contact/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/id/fdroid/index.html b/id/fdroid/index.html
index e79f3adb7e..a1db3b48f8 100644
--- a/id/fdroid/index.html
+++ b/id/fdroid/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/id/index.html b/id/index.html
index 44ff4380be..05c7203a95 100644
--- a/id/index.html
+++ b/id/index.html
@@ -260,6 +260,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -385,7 +391,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -393,7 +399,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -401,7 +407,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -464,41 +470,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/id/invitation/index.html b/id/invitation/index.html
index 028be18424..bc5a45fbd3 100644
--- a/id/invitation/index.html
+++ b/id/invitation/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/id/messaging/index.html b/id/messaging/index.html
index 7e46bc6a91..c8e39e6e08 100644
--- a/id/messaging/index.html
+++ b/id/messaging/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/id/old/index.html b/id/old/index.html
index 26a0edc561..36f013f21b 100644
--- a/id/old/index.html
+++ b/id/old/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -327,7 +333,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -335,7 +341,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -343,7 +349,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -359,7 +365,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -367,7 +373,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -375,7 +381,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -383,7 +389,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -391,7 +397,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -399,7 +405,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -407,7 +413,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -415,7 +421,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -431,7 +437,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -439,7 +445,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -447,7 +453,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -455,7 +461,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -465,7 +471,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -506,41 +512,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/index.html b/index.html
index 1f19047aaf..e03d7b643d 100644
--- a/index.html
+++ b/index.html
@@ -260,6 +260,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -385,7 +391,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -393,7 +399,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -401,7 +407,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -464,41 +470,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/invitation/index.html b/invitation/index.html
index 55c729a9cf..0d8a9d3b50 100644
--- a/invitation/index.html
+++ b/invitation/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/it/contact/index.html b/it/contact/index.html
index 473d5255e6..013d5366c7 100644
--- a/it/contact/index.html
+++ b/it/contact/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/it/fdroid/index.html b/it/fdroid/index.html
index 61a635e06e..d0fc473bc3 100644
--- a/it/fdroid/index.html
+++ b/it/fdroid/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/it/index.html b/it/index.html
index ca0720d7c2..07f84206f1 100644
--- a/it/index.html
+++ b/it/index.html
@@ -260,6 +260,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -385,7 +391,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -393,7 +399,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -401,7 +407,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -464,41 +470,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/it/invitation/index.html b/it/invitation/index.html
index ff2d7441c6..892d036652 100644
--- a/it/invitation/index.html
+++ b/it/invitation/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/it/messaging/index.html b/it/messaging/index.html
index 07b3669057..7d06c778fc 100644
--- a/it/messaging/index.html
+++ b/it/messaging/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/it/old/index.html b/it/old/index.html
index bcd4586ec5..26be0cf0c9 100644
--- a/it/old/index.html
+++ b/it/old/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -327,7 +333,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -335,7 +341,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -343,7 +349,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -359,7 +365,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -367,7 +373,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -375,7 +381,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -383,7 +389,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -391,7 +397,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -399,7 +405,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -407,7 +413,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -415,7 +421,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -431,7 +437,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -439,7 +445,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -447,7 +453,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -455,7 +461,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -465,7 +471,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -506,41 +512,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ja/contact/index.html b/ja/contact/index.html
index 757c9ccb1e..94b4af5ce2 100644
--- a/ja/contact/index.html
+++ b/ja/contact/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ja/fdroid/index.html b/ja/fdroid/index.html
index 282c329996..5b8bf23494 100644
--- a/ja/fdroid/index.html
+++ b/ja/fdroid/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ja/index.html b/ja/index.html
index e48f998c73..71ee98af1a 100644
--- a/ja/index.html
+++ b/ja/index.html
@@ -260,6 +260,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -385,7 +391,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -393,7 +399,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -401,7 +407,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -464,41 +470,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ja/invitation/index.html b/ja/invitation/index.html
index ae6c1bd7a2..3dbf3c8623 100644
--- a/ja/invitation/index.html
+++ b/ja/invitation/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ja/messaging/index.html b/ja/messaging/index.html
index 40d3681653..0b59241c5c 100644
--- a/ja/messaging/index.html
+++ b/ja/messaging/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ja/old/index.html b/ja/old/index.html
index ff964fce7c..4d9e29b08a 100644
--- a/ja/old/index.html
+++ b/ja/old/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -327,7 +333,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -335,7 +341,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -343,7 +349,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -359,7 +365,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -367,7 +373,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -375,7 +381,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -383,7 +389,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -391,7 +397,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -399,7 +405,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -407,7 +413,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -415,7 +421,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -431,7 +437,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -439,7 +445,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -447,7 +453,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -455,7 +461,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -465,7 +471,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -506,41 +512,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/jobs/index.html b/jobs/index.html
index 63f5cb3ba2..682156dff9 100644
--- a/jobs/index.html
+++ b/jobs/index.html
@@ -230,6 +230,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                         
                             
                                 <li>
-                                    <a href="undefined" class="flag-anchor">
+                                    <a href="undefined">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -400,41 +406,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/messaging/index.html b/messaging/index.html
index 5e424a8554..a3ae2bc62d 100644
--- a/messaging/index.html
+++ b/messaging/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/nl/contact/index.html b/nl/contact/index.html
index b92d6ed792..ba1209e0b4 100644
--- a/nl/contact/index.html
+++ b/nl/contact/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/nl/fdroid/index.html b/nl/fdroid/index.html
index eb4aef00f1..80f24ae233 100644
--- a/nl/fdroid/index.html
+++ b/nl/fdroid/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/nl/index.html b/nl/index.html
index 55d34a0cb0..d87eea16b2 100644
--- a/nl/index.html
+++ b/nl/index.html
@@ -260,6 +260,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -385,7 +391,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -393,7 +399,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -401,7 +407,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -464,41 +470,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/nl/invitation/index.html b/nl/invitation/index.html
index f36305dbc1..6a3d80adaf 100644
--- a/nl/invitation/index.html
+++ b/nl/invitation/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/nl/messaging/index.html b/nl/messaging/index.html
index 3fad1ab663..9090bfedad 100644
--- a/nl/messaging/index.html
+++ b/nl/messaging/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/nl/old/index.html b/nl/old/index.html
index 3741792a56..ebdc869bdf 100644
--- a/nl/old/index.html
+++ b/nl/old/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -327,7 +333,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -335,7 +341,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -343,7 +349,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -359,7 +365,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -367,7 +373,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -375,7 +381,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -383,7 +389,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -391,7 +397,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -399,7 +405,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -407,7 +413,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -415,7 +421,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -431,7 +437,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -439,7 +445,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -447,7 +453,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -455,7 +461,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -465,7 +471,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -506,41 +512,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/old/index.html b/old/index.html
index bd864c4d02..b69351b664 100644
--- a/old/index.html
+++ b/old/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -327,7 +333,7 @@
                     
                         
                             <li>
-                                <a href="/en/old/" class="flag-anchor">
+                                <a href="/en/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -335,7 +341,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -343,7 +349,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -359,7 +365,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -367,7 +373,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -375,7 +381,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -383,7 +389,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -391,7 +397,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -399,7 +405,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -407,7 +413,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -415,7 +421,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -431,7 +437,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -439,7 +445,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -447,7 +453,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -455,7 +461,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -465,7 +471,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -506,41 +512,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/pl/contact/index.html b/pl/contact/index.html
index 1adccbebca..ca2b5e9b96 100644
--- a/pl/contact/index.html
+++ b/pl/contact/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/pl/fdroid/index.html b/pl/fdroid/index.html
index 7f61c62632..7c0f093562 100644
--- a/pl/fdroid/index.html
+++ b/pl/fdroid/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/pl/index.html b/pl/index.html
index 2226bc8450..72a103aa38 100644
--- a/pl/index.html
+++ b/pl/index.html
@@ -260,6 +260,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -385,7 +391,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -393,7 +399,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -401,7 +407,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -464,41 +470,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/pl/invitation/index.html b/pl/invitation/index.html
index 57fab37205..92fbf14cd6 100644
--- a/pl/invitation/index.html
+++ b/pl/invitation/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/pl/messaging/index.html b/pl/messaging/index.html
index abe5b247b7..aaef0d3686 100644
--- a/pl/messaging/index.html
+++ b/pl/messaging/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/pl/old/index.html b/pl/old/index.html
index 12213ffbda..5f40447163 100644
--- a/pl/old/index.html
+++ b/pl/old/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -327,7 +333,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -335,7 +341,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -343,7 +349,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -359,7 +365,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -367,7 +373,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -375,7 +381,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -383,7 +389,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -391,7 +397,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -399,7 +405,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -407,7 +413,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -415,7 +421,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -431,7 +437,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -439,7 +445,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -447,7 +453,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -455,7 +461,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -465,7 +471,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -506,41 +512,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/privacy/index.html b/privacy/index.html
index 04baea90c6..36ad3af162 100644
--- a/privacy/index.html
+++ b/privacy/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -305,41 +311,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/pt_BR/contact/index.html b/pt_BR/contact/index.html
index 7555cb4822..966676fcd1 100644
--- a/pt_BR/contact/index.html
+++ b/pt_BR/contact/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/pt_BR/fdroid/index.html b/pt_BR/fdroid/index.html
index 8faa549b35..4bad08404e 100644
--- a/pt_BR/fdroid/index.html
+++ b/pt_BR/fdroid/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/pt_BR/index.html b/pt_BR/index.html
index cf3990e063..696f2c4723 100644
--- a/pt_BR/index.html
+++ b/pt_BR/index.html
@@ -260,6 +260,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -385,7 +391,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -393,7 +399,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -401,7 +407,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -464,41 +470,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/pt_BR/invitation/index.html b/pt_BR/invitation/index.html
index a6362ef4d0..3e0e8e8cd2 100644
--- a/pt_BR/invitation/index.html
+++ b/pt_BR/invitation/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/pt_BR/messaging/index.html b/pt_BR/messaging/index.html
index 1c1e4762b0..2ee18c7ac7 100644
--- a/pt_BR/messaging/index.html
+++ b/pt_BR/messaging/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/pt_BR/old/index.html b/pt_BR/old/index.html
index eef8b725eb..9610e77578 100644
--- a/pt_BR/old/index.html
+++ b/pt_BR/old/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -327,7 +333,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -335,7 +341,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -343,7 +349,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -359,7 +365,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -367,7 +373,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -375,7 +381,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -383,7 +389,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -391,7 +397,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -399,7 +405,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -407,7 +413,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -415,7 +421,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -431,7 +437,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -439,7 +445,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -447,7 +453,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -455,7 +461,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -465,7 +471,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -506,41 +512,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ro/contact/index.html b/ro/contact/index.html
index f27afeaef4..e888c32833 100644
--- a/ro/contact/index.html
+++ b/ro/contact/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ro/fdroid/index.html b/ro/fdroid/index.html
index da1170036a..ec0dad57c6 100644
--- a/ro/fdroid/index.html
+++ b/ro/fdroid/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ro/index.html b/ro/index.html
index b5d04d101e..b6d1d88149 100644
--- a/ro/index.html
+++ b/ro/index.html
@@ -256,6 +256,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -342,7 +348,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -376,7 +382,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -384,7 +390,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -392,7 +398,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -414,7 +420,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -455,41 +461,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ro/invitation/index.html b/ro/invitation/index.html
index 338ee985af..5031b3f8ff 100644
--- a/ro/invitation/index.html
+++ b/ro/invitation/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ro/messaging/index.html b/ro/messaging/index.html
index 595fcd87fe..c9e1a88a1c 100644
--- a/ro/messaging/index.html
+++ b/ro/messaging/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ro/old/index.html b/ro/old/index.html
index 051a23f75b..97b6e28f8a 100644
--- a/ro/old/index.html
+++ b/ro/old/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -318,7 +324,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -326,7 +332,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -334,7 +340,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -342,7 +348,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -350,7 +356,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -358,7 +364,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -366,7 +372,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -374,7 +380,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -382,7 +388,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -390,7 +396,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -398,7 +404,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -406,7 +412,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -414,7 +420,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -422,7 +428,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -430,7 +436,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -438,7 +444,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -446,7 +452,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -456,7 +462,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -497,41 +503,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ru/contact/index.html b/ru/contact/index.html
index 1b7c41b209..d4f31375a7 100644
--- a/ru/contact/index.html
+++ b/ru/contact/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ru/fdroid/index.html b/ru/fdroid/index.html
index 74ad09ee19..f62e07fcfd 100644
--- a/ru/fdroid/index.html
+++ b/ru/fdroid/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ru/index.html b/ru/index.html
index 44e3f25622..9a33de1f3a 100644
--- a/ru/index.html
+++ b/ru/index.html
@@ -260,6 +260,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -385,7 +391,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -393,7 +399,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -401,7 +407,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -464,41 +470,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ru/invitation/index.html b/ru/invitation/index.html
index bf8046923a..9d4e68c227 100644
--- a/ru/invitation/index.html
+++ b/ru/invitation/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ru/messaging/index.html b/ru/messaging/index.html
index 417918dfff..e2427cf7ae 100644
--- a/ru/messaging/index.html
+++ b/ru/messaging/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/ru/old/index.html b/ru/old/index.html
index 1166b3f7a6..470597f13b 100644
--- a/ru/old/index.html
+++ b/ru/old/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -327,7 +333,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -335,7 +341,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -343,7 +349,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -359,7 +365,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -367,7 +373,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -375,7 +381,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -383,7 +389,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -391,7 +397,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -399,7 +405,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -407,7 +413,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -415,7 +421,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -431,7 +437,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -439,7 +445,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -447,7 +453,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -455,7 +461,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -465,7 +471,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -506,41 +512,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/security/index.html b/security/index.html
index 8a4d1553e3..52e6f2e430 100644
--- a/security/index.html
+++ b/security/index.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="undefined" class="flag-anchor">
+                                    <a href="undefined">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -401,41 +407,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/token/index.html b/token/index.html
index 5512231aa3..73e2d24ae6 100644
--- a/token/index.html
+++ b/token/index.html
@@ -421,6 +421,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -490,41 +496,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/tr/contact/index.html b/tr/contact/index.html
index bd81c92a08..3993bb51fd 100644
--- a/tr/contact/index.html
+++ b/tr/contact/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/tr/fdroid/index.html b/tr/fdroid/index.html
index 22a4119f32..18f5128482 100644
--- a/tr/fdroid/index.html
+++ b/tr/fdroid/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/tr/index.html b/tr/index.html
index 947a393e76..4c97cad202 100644
--- a/tr/index.html
+++ b/tr/index.html
@@ -256,6 +256,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -342,7 +348,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -376,7 +382,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -384,7 +390,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -392,7 +398,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -414,7 +420,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -455,41 +461,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/tr/invitation/index.html b/tr/invitation/index.html
index 8eb0e4cd26..fd31cc4f6b 100644
--- a/tr/invitation/index.html
+++ b/tr/invitation/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/tr/messaging/index.html b/tr/messaging/index.html
index 9054f0d8e6..601adeba39 100644
--- a/tr/messaging/index.html
+++ b/tr/messaging/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/tr/old/index.html b/tr/old/index.html
index 3ee4941fb4..370a08364f 100644
--- a/tr/old/index.html
+++ b/tr/old/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -318,7 +324,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -326,7 +332,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -334,7 +340,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -342,7 +348,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -350,7 +356,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -358,7 +364,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -366,7 +372,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -374,7 +380,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -382,7 +388,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -390,7 +396,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -398,7 +404,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -406,7 +412,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -414,7 +420,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -422,7 +428,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -430,7 +436,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -438,7 +444,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -446,7 +452,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -456,7 +462,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -497,41 +503,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/transparency/index.html b/transparency/index.html
index 0e1f91b031..4fb29e1e7f 100644
--- a/transparency/index.html
+++ b/transparency/index.html
@@ -231,6 +231,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -323,7 +329,7 @@
                         
                             
                                 <li>
-                                    <a href="undefined" class="flag-anchor">
+                                    <a href="undefined">
                                         <p>English</p>
                                     </a>
                                 </li>
@@ -401,41 +407,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/uk/contact/index.html b/uk/contact/index.html
index ef06db3fbc..73376b7eda 100644
--- a/uk/contact/index.html
+++ b/uk/contact/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/uk/fdroid/index.html b/uk/fdroid/index.html
index 61221f745a..6aa034c13e 100644
--- a/uk/fdroid/index.html
+++ b/uk/fdroid/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/uk/index.html b/uk/index.html
index 02a996b3ba..e5ed63468f 100644
--- a/uk/index.html
+++ b/uk/index.html
@@ -260,6 +260,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -385,7 +391,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -393,7 +399,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -401,7 +407,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -464,41 +470,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/uk/invitation/index.html b/uk/invitation/index.html
index 6c0eaebaed..b06283dad2 100644
--- a/uk/invitation/index.html
+++ b/uk/invitation/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/uk/messaging/index.html b/uk/messaging/index.html
index 0a8a04b83a..e29ff1aa4f 100644
--- a/uk/messaging/index.html
+++ b/uk/messaging/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/uk/old/index.html b/uk/old/index.html
index ec0e45492f..eec042721a 100644
--- a/uk/old/index.html
+++ b/uk/old/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -327,7 +333,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -335,7 +341,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -343,7 +349,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -359,7 +365,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -367,7 +373,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -375,7 +381,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -383,7 +389,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -391,7 +397,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -399,7 +405,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -407,7 +413,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -415,7 +421,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -431,7 +437,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -439,7 +445,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -447,7 +453,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -455,7 +461,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -465,7 +471,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -506,41 +512,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/zh_Hans/contact/index.html b/zh_Hans/contact/index.html
index 58600a3600..f5f26a655b 100644
--- a/zh_Hans/contact/index.html
+++ b/zh_Hans/contact/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/zh_Hans/fdroid/index.html b/zh_Hans/fdroid/index.html
index 277819e55c..bb6c320c88 100644
--- a/zh_Hans/fdroid/index.html
+++ b/zh_Hans/fdroid/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/zh_Hans/index.html b/zh_Hans/index.html
index 640bedf2c1..f0a96fbf64 100644
--- a/zh_Hans/index.html
+++ b/zh_Hans/index.html
@@ -260,6 +260,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -385,7 +391,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -393,7 +399,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -401,7 +407,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -464,41 +470,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/zh_Hans/invitation/index.html b/zh_Hans/invitation/index.html
index 3c0400b071..9f5164f319 100644
--- a/zh_Hans/invitation/index.html
+++ b/zh_Hans/invitation/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/zh_Hans/messaging/index.html b/zh_Hans/messaging/index.html
index d39e716b89..1e0806619c 100644
--- a/zh_Hans/messaging/index.html
+++ b/zh_Hans/messaging/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -331,7 +337,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -339,7 +345,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -347,7 +353,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -355,7 +361,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -363,7 +369,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -371,7 +377,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -379,7 +385,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -387,7 +393,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -395,7 +401,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -403,7 +409,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -411,7 +417,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -419,7 +425,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -427,7 +433,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -435,7 +441,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -443,7 +449,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -451,7 +457,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -459,7 +465,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -469,7 +475,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -510,41 +516,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/zh_Hans/old/index.html b/zh_Hans/old/index.html
index fe9057b6fb..7cd70006e8 100644
--- a/zh_Hans/old/index.html
+++ b/zh_Hans/old/index.html
@@ -240,6 +240,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -327,7 +333,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -335,7 +341,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -343,7 +349,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -351,7 +357,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -359,7 +365,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -367,7 +373,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -375,7 +381,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -383,7 +389,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -391,7 +397,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -399,7 +405,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -407,7 +413,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -415,7 +421,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -423,7 +429,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -431,7 +437,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -439,7 +445,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -447,7 +453,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -455,7 +461,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -465,7 +471,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -506,41 +512,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/zh_Hant/contact/index.html b/zh_Hant/contact/index.html
index 38f2f3673f..90c338d0b6 100644
--- a/zh_Hant/contact/index.html
+++ b/zh_Hant/contact/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/contact/" class="flag-anchor">
+                                <a href="/contact/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/contact/" class="flag-anchor">
+                                <a href="/ar/contact/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/contact/" class="flag-anchor">
+                                <a href="/cs/contact/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/contact/" class="flag-anchor">
+                                <a href="/de/contact/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/contact/" class="flag-anchor">
+                                <a href="/es/contact/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/contact/" class="flag-anchor">
+                                <a href="/fi/contact/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/contact/" class="flag-anchor">
+                                <a href="/fr/contact/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/contact/" class="flag-anchor">
+                                <a href="/he/contact/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/contact/" class="flag-anchor">
+                                <a href="/hu/contact/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/contact/" class="flag-anchor">
+                                <a href="/id/contact/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/contact/" class="flag-anchor">
+                                <a href="/it/contact/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/contact/" class="flag-anchor">
+                                <a href="/ja/contact/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/contact/" class="flag-anchor">
+                                <a href="/nl/contact/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/contact/" class="flag-anchor">
+                                <a href="/pl/contact/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/contact/" class="flag-anchor">
+                                <a href="/pt_BR/contact/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/contact/" class="flag-anchor">
+                                <a href="/uk/contact/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/contact/" class="flag-anchor">
+                                <a href="/zh_Hans/contact/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/contact/" class="flag-anchor">
+                                <a href="/ru/contact/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/zh_Hant/fdroid/index.html b/zh_Hant/fdroid/index.html
index 33564652a0..d63357a420 100644
--- a/zh_Hant/fdroid/index.html
+++ b/zh_Hant/fdroid/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/fdroid/" class="flag-anchor">
+                                <a href="/fdroid/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/fdroid/" class="flag-anchor">
+                                <a href="/ar/fdroid/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/fdroid/" class="flag-anchor">
+                                <a href="/cs/fdroid/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/fdroid/" class="flag-anchor">
+                                <a href="/de/fdroid/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/fdroid/" class="flag-anchor">
+                                <a href="/es/fdroid/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/fdroid/" class="flag-anchor">
+                                <a href="/fi/fdroid/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/fdroid/" class="flag-anchor">
+                                <a href="/fr/fdroid/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/fdroid/" class="flag-anchor">
+                                <a href="/he/fdroid/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/fdroid/" class="flag-anchor">
+                                <a href="/hu/fdroid/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/fdroid/" class="flag-anchor">
+                                <a href="/id/fdroid/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/fdroid/" class="flag-anchor">
+                                <a href="/it/fdroid/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/fdroid/" class="flag-anchor">
+                                <a href="/ja/fdroid/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/fdroid/" class="flag-anchor">
+                                <a href="/nl/fdroid/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/fdroid/" class="flag-anchor">
+                                <a href="/pl/fdroid/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/fdroid/" class="flag-anchor">
+                                <a href="/pt_BR/fdroid/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/fdroid/" class="flag-anchor">
+                                <a href="/uk/fdroid/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/fdroid/" class="flag-anchor">
+                                <a href="/zh_Hans/fdroid/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/fdroid/" class="flag-anchor">
+                                <a href="/ru/fdroid/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/zh_Hant/index.html b/zh_Hant/index.html
index 9ce4639caa..0eea4df272 100644
--- a/zh_Hant/index.html
+++ b/zh_Hant/index.html
@@ -256,6 +256,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -342,7 +348,7 @@
                     
                         
                             <li>
-                                <a href="/" class="flag-anchor">
+                                <a href="/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/de/" class="flag-anchor">
+                                <a href="/de/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/es/" class="flag-anchor">
+                                <a href="/es/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -376,7 +382,7 @@
                     
                         
                             <li>
-                                <a href="/hu/" class="flag-anchor">
+                                <a href="/hu/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -384,7 +390,7 @@
                     
                         
                             <li>
-                                <a href="/id/" class="flag-anchor">
+                                <a href="/id/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -392,7 +398,7 @@
                     
                         
                             <li>
-                                <a href="/it/" class="flag-anchor">
+                                <a href="/it/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -414,7 +420,7 @@
                     
                         
                             <li>
-                                <a href="/ru/" class="flag-anchor">
+                                <a href="/ru/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -455,41 +461,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/zh_Hant/invitation/index.html b/zh_Hant/invitation/index.html
index 03c4d7d6a2..5aebe5c0b0 100644
--- a/zh_Hant/invitation/index.html
+++ b/zh_Hant/invitation/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/invitation/" class="flag-anchor">
+                                <a href="/invitation/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/invitation/" class="flag-anchor">
+                                <a href="/ar/invitation/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/invitation/" class="flag-anchor">
+                                <a href="/cs/invitation/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/invitation/" class="flag-anchor">
+                                <a href="/de/invitation/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/invitation/" class="flag-anchor">
+                                <a href="/es/invitation/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/invitation/" class="flag-anchor">
+                                <a href="/fi/invitation/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/invitation/" class="flag-anchor">
+                                <a href="/fr/invitation/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/invitation/" class="flag-anchor">
+                                <a href="/he/invitation/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/invitation/" class="flag-anchor">
+                                <a href="/hu/invitation/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/invitation/" class="flag-anchor">
+                                <a href="/id/invitation/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/invitation/" class="flag-anchor">
+                                <a href="/it/invitation/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/invitation/" class="flag-anchor">
+                                <a href="/ja/invitation/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/invitation/" class="flag-anchor">
+                                <a href="/nl/invitation/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/invitation/" class="flag-anchor">
+                                <a href="/pl/invitation/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/invitation/" class="flag-anchor">
+                                <a href="/pt_BR/invitation/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/invitation/" class="flag-anchor">
+                                <a href="/uk/invitation/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/invitation/" class="flag-anchor">
+                                <a href="/zh_Hans/invitation/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/invitation/" class="flag-anchor">
+                                <a href="/ru/invitation/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/zh_Hant/messaging/index.html b/zh_Hant/messaging/index.html
index f6eff4d80a..746787546e 100644
--- a/zh_Hant/messaging/index.html
+++ b/zh_Hant/messaging/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -322,7 +328,7 @@
                     
                         
                             <li>
-                                <a href="/messaging/" class="flag-anchor">
+                                <a href="/messaging/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -330,7 +336,7 @@
                     
                         
                             <li>
-                                <a href="/ar/messaging/" class="flag-anchor">
+                                <a href="/ar/messaging/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -338,7 +344,7 @@
                     
                         
                             <li>
-                                <a href="/cs/messaging/" class="flag-anchor">
+                                <a href="/cs/messaging/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -346,7 +352,7 @@
                     
                         
                             <li>
-                                <a href="/de/messaging/" class="flag-anchor">
+                                <a href="/de/messaging/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -354,7 +360,7 @@
                     
                         
                             <li>
-                                <a href="/es/messaging/" class="flag-anchor">
+                                <a href="/es/messaging/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -362,7 +368,7 @@
                     
                         
                             <li>
-                                <a href="/fi/messaging/" class="flag-anchor">
+                                <a href="/fi/messaging/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -370,7 +376,7 @@
                     
                         
                             <li>
-                                <a href="/fr/messaging/" class="flag-anchor">
+                                <a href="/fr/messaging/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -378,7 +384,7 @@
                     
                         
                             <li>
-                                <a href="/he/messaging/" class="flag-anchor">
+                                <a href="/he/messaging/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -386,7 +392,7 @@
                     
                         
                             <li>
-                                <a href="/hu/messaging/" class="flag-anchor">
+                                <a href="/hu/messaging/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -394,7 +400,7 @@
                     
                         
                             <li>
-                                <a href="/id/messaging/" class="flag-anchor">
+                                <a href="/id/messaging/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -402,7 +408,7 @@
                     
                         
                             <li>
-                                <a href="/it/messaging/" class="flag-anchor">
+                                <a href="/it/messaging/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -410,7 +416,7 @@
                     
                         
                             <li>
-                                <a href="/ja/messaging/" class="flag-anchor">
+                                <a href="/ja/messaging/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -418,7 +424,7 @@
                     
                         
                             <li>
-                                <a href="/nl/messaging/" class="flag-anchor">
+                                <a href="/nl/messaging/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -426,7 +432,7 @@
                     
                         
                             <li>
-                                <a href="/pl/messaging/" class="flag-anchor">
+                                <a href="/pl/messaging/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -434,7 +440,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/messaging/" class="flag-anchor">
+                                <a href="/pt_BR/messaging/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -442,7 +448,7 @@
                     
                         
                             <li>
-                                <a href="/uk/messaging/" class="flag-anchor">
+                                <a href="/uk/messaging/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -450,7 +456,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/messaging/" class="flag-anchor">
+                                <a href="/zh_Hans/messaging/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -460,7 +466,7 @@
                     
                         
                             <li>
-                                <a href="/ru/messaging/" class="flag-anchor">
+                                <a href="/ru/messaging/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -501,41 +507,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();
diff --git a/zh_Hant/old/index.html b/zh_Hant/old/index.html
index 96c5d8694b..c46884e243 100644
--- a/zh_Hant/old/index.html
+++ b/zh_Hant/old/index.html
@@ -236,6 +236,12 @@
                         target="_blank">SimpleXMQ
                         <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg>
                     </a></li>
+                    <hr>
+                    <li>
+                        <a href="/old" class="site-switch-btn">
+                            <p>Old site</p>
+                        </a>
+                    </li>
                 </ul>
             </li>
 
@@ -318,7 +324,7 @@
                     
                         
                             <li>
-                                <a href="/old/" class="flag-anchor">
+                                <a href="/old/">
                                     <p>English</p>
                                 </a>
                             </li>
@@ -326,7 +332,7 @@
                     
                         
                             <li>
-                                <a href="/ar/old/" class="flag-anchor">
+                                <a href="/ar/old/">
                                     <p>العربية</p>
                                 </a>
                             </li>
@@ -334,7 +340,7 @@
                     
                         
                             <li>
-                                <a href="/cs/old/" class="flag-anchor">
+                                <a href="/cs/old/">
                                     <p>Čeština</p>
                                 </a>
                             </li>
@@ -342,7 +348,7 @@
                     
                         
                             <li>
-                                <a href="/de/old/" class="flag-anchor">
+                                <a href="/de/old/">
                                     <p>Deutsch</p>
                                 </a>
                             </li>
@@ -350,7 +356,7 @@
                     
                         
                             <li>
-                                <a href="/es/old/" class="flag-anchor">
+                                <a href="/es/old/">
                                     <p>Español</p>
                                 </a>
                             </li>
@@ -358,7 +364,7 @@
                     
                         
                             <li>
-                                <a href="/fi/old/" class="flag-anchor">
+                                <a href="/fi/old/">
                                     <p>Suomi</p>
                                 </a>
                             </li>
@@ -366,7 +372,7 @@
                     
                         
                             <li>
-                                <a href="/fr/old/" class="flag-anchor">
+                                <a href="/fr/old/">
                                     <p>Français</p>
                                 </a>
                             </li>
@@ -374,7 +380,7 @@
                     
                         
                             <li>
-                                <a href="/he/old/" class="flag-anchor">
+                                <a href="/he/old/">
                                     <p>עִברִית</p>
                                 </a>
                             </li>
@@ -382,7 +388,7 @@
                     
                         
                             <li>
-                                <a href="/hu/old/" class="flag-anchor">
+                                <a href="/hu/old/">
                                     <p>Magyar</p>
                                 </a>
                             </li>
@@ -390,7 +396,7 @@
                     
                         
                             <li>
-                                <a href="/id/old/" class="flag-anchor">
+                                <a href="/id/old/">
                                     <p>Indonesia</p>
                                 </a>
                             </li>
@@ -398,7 +404,7 @@
                     
                         
                             <li>
-                                <a href="/it/old/" class="flag-anchor">
+                                <a href="/it/old/">
                                     <p>Italiano</p>
                                 </a>
                             </li>
@@ -406,7 +412,7 @@
                     
                         
                             <li>
-                                <a href="/ja/old/" class="flag-anchor">
+                                <a href="/ja/old/">
                                     <p>日本語</p>
                                 </a>
                             </li>
@@ -414,7 +420,7 @@
                     
                         
                             <li>
-                                <a href="/nl/old/" class="flag-anchor">
+                                <a href="/nl/old/">
                                     <p>Nederlands</p>
                                 </a>
                             </li>
@@ -422,7 +428,7 @@
                     
                         
                             <li>
-                                <a href="/pl/old/" class="flag-anchor">
+                                <a href="/pl/old/">
                                     <p>Polski</p>
                                 </a>
                             </li>
@@ -430,7 +436,7 @@
                     
                         
                             <li>
-                                <a href="/pt_BR/old/" class="flag-anchor">
+                                <a href="/pt_BR/old/">
                                     <p>Português</p>
                                 </a>
                             </li>
@@ -438,7 +444,7 @@
                     
                         
                             <li>
-                                <a href="/uk/old/" class="flag-anchor">
+                                <a href="/uk/old/">
                                     <p>Українська</p>
                                 </a>
                             </li>
@@ -446,7 +452,7 @@
                     
                         
                             <li>
-                                <a href="/zh_Hans/old/" class="flag-anchor">
+                                <a href="/zh_Hans/old/">
                                     <p>简体中文</p>
                                 </a>
                             </li>
@@ -456,7 +462,7 @@
                     
                         
                             <li>
-                                <a href="/ru/old/" class="flag-anchor">
+                                <a href="/ru/old/">
                                     <p>Русский</p>
                                 </a>
                             </li>
@@ -497,41 +503,40 @@ const userTheme = localStorage.getItem('theme');
 const systemTheme = window.matchMedia('(prefers-color-scheme: dark)').matches;
 const prismThemeLink = document.getElementById('prism-theme')
 
-const iconToggle = () => {
+function iconToggle () {
     sunIcon.classList.toggle('hidden');
     moonIcon.classList.toggle('hidden');
 }
 
-const themeCheck = () => {
-    if(userTheme === 'dark' || (!userTheme && systemTheme)){
+function themeCheck() {
+    if (userTheme === 'dark' || (!userTheme && systemTheme)) {
         document.documentElement.classList.add('dark');
         moonIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
     }
     else{
         sunIcon.classList.add('hidden');
-        if(prismThemeLink){
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
     }
 }
 themeCheck();
 
-const themeSwitch = () => {
-    if(document.documentElement.classList.contains('dark')){
+function themeSwitch () {
+    if (document.documentElement.classList.contains('dark')) {
         document.documentElement.classList.remove('dark');
-        localStorage.setItem('theme','light');
+        localStorage.setItem('theme', 'light');
         if(prismThemeLink){
             prismThemeLink.setAttribute('href','/css/prism-light.min.css')
         }
         iconToggle();
-    }
-    else{
+    } else {
         document.documentElement.classList.add('dark');
-        localStorage.setItem('theme','dark');
-        if(prismThemeLink){
+        localStorage.setItem('theme', 'dark');
+        if (prismThemeLink) {
             prismThemeLink.setAttribute('href','/css/prism-dark.min.css')
         }
         iconToggle();