Add localizations system

README.md

@@ -23,3 +23,34 @@ Community: [#fluffychat:matrix.org](https://matrix.to/#/#fluffychat:matrix.org)
 4. `flutter config --enable-web`
 
 5. `flutter run`
+
+## How to add translations for your language
+
+1. Replace the non-translated string in the codebase:
+```
+Text("Hello world"),
+```
+with a method call:
+```
+Text(I18n.of(context).helloWorld),
+```
+And add the method to `/lib/i18n/i18n.dart`:
+```
+String get helloWorld => Intl.message('Hello world');
+```
+
+2. Add the string to the .arb files with this command:
+```
+flutter pub run intl_translation:extract_to_arb --output-dir=lib/i18n lib/i18n/i18n.dart
+```
+
+3. Copy the new translation objects from `/lib/i18n/intl_message.arb` to `/lib/i18n/intl_<yourlanguage>.arb` and translate it or create a new file for your language by copying `intl_message.arb`.
+
+4. Update the translations with this command:
+```
+flutter pub run intl_translation:generate_from_arb \
+    --output-dir=lib/i18n --no-use-deferred-loading \
+    lib/main.dart lib/i18n/intl_*.arb
+```
+
+5. Make sure your language is in `supportedLocales` in `/lib/main.dart`.