Add translation support using i18next

package.json

@@ -48,6 +48,9 @@
     "formik": "2.4.6",
     "html-dom-parser": "4.0.0",
     "html-react-parser": "4.2.0",
+    "i18next": "23.12.2",
+    "i18next-browser-languagedetector": "8.0.0",
+    "i18next-http-backend": "2.5.2",
     "immer": "9.0.16",
     "is-hotkey": "0.2.0",
     "jotai": "2.6.0",
@@ -65,6 +68,7 @@
     "react-dom": "18.2.0",
     "react-error-boundary": "4.0.13",
     "react-google-recaptcha": "2.1.0",
+    "react-i18next": "15.0.0",
     "react-modal": "3.16.1",
     "react-range": "1.8.14",
     "react-router-dom": "6.20.0",

public/locales/de.json

@@ -0,0 +1,7 @@
+{
+  "Organisms": {
+    "RoomCommon": {
+      "changed_room_name": " hat den Raum Name geändert"
+    }
+  }
+}

public/locales/en.json

@@ -0,0 +1,7 @@
+{
+  "Organisms": {
+    "RoomCommon": {
+      "changed_room_name": " changed room name"
+    }
+  }
+}

src/app/features/room/RoomTimeline.tsx

@@ -46,6 +46,7 @@ import {
 } from 'folds';
 import { isKeyHotkey } from 'is-hotkey';
 import { Opts as LinkifyOpts } from 'linkifyjs';
+import { useTranslation } from 'react-i18next';
 import {
   decryptFile,
   eventWithShortcode,
@@ -958,6 +959,7 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
     },
     [editor]
   );
+  const { t } = useTranslation();
 
   const renderMatrixEvent = useMatrixEventRenderer<
     [string, MatrixEvent, number, EventTimelineSet, boolean]
@@ -1273,7 +1275,7 @@ export function RoomTimeline({ room, eventId, roomInputRef, editor }: RoomTimeli
                 <Box grow="Yes" direction="Column">
                   <Text size="T300" priority="300">
                     <b>{senderName}</b>
-                    {' changed room name'}
+                    {t('Organisms.RoomCommon.changed_room_name')}
                   </Text>
                 </Box>
               }

src/app/i18n.ts

@@ -0,0 +1,31 @@
+import i18n from 'i18next';
+import LanguageDetector from 'i18next-browser-languagedetector';
+import Backend, { HttpBackendOptions } from 'i18next-http-backend';
+import { initReactI18next } from 'react-i18next';
+import { trimTrailingSlash } from './utils/common';
+
+i18n
+  // i18next-http-backend
+  // loads translations from your server
+  // https://github.com/i18next/i18next-http-backend
+  .use(Backend)
+  // detect user language
+  // learn more: https://github.com/i18next/i18next-browser-languageDetector
+  .use(LanguageDetector)
+  // pass the i18n instance to react-i18next.
+  .use(initReactI18next)
+  // init i18next
+  // for all options read: https://www.i18next.com/overview/configuration-options
+  .init<HttpBackendOptions>({
+    debug: false,
+    fallbackLng: 'en',
+    interpolation: {
+      escapeValue: false, // not needed for react as it escapes by default
+    },
+    load: 'languageOnly',
+    backend: {
+      loadPath: `${trimTrailingSlash(import.meta.env.BASE_URL)}/public/locales/{{lng}}.json`,
+    },
+  });
+
+export default i18n;

src/index.tsx

@@ -14,6 +14,9 @@ import settings from './client/state/settings';
 
 import App from './app/pages/App';
 
+// import i18n (needs to be bundled ;))
+import './app/i18n';
+
 document.body.classList.add(configClass, varsClass);
 settings.applyTheme();
 

vite.config.js

@@ -35,6 +35,10 @@ const copyFiles = {
       src: 'public/res/android',
       dest: 'public/',
     },
+    {
+      src: 'public/locales',
+      dest: 'public/',
+    },
   ],
 };