Migrate to Weblate for translations

CONTRIBUTING.md

@@ -30,10 +30,10 @@ You can get logs in various ways:
 ## Contributing Translations
 
 All translations are done via
-[Transifex](https://www.transifex.com/projects/p/syncthing-android/). If you
+[Hosted Weblate](https://hosted.weblate.org/projects/syncthing/android/). If you
 wish to contribute to a translation, just head over there and sign up.
 Before every release, the language resources are updated from the
-latest info on Transifex.
+latest info on Weblate.
 
 ## Contributing Code
 

README.md

@@ -29,11 +29,17 @@ Handling feature requests use up the little time that is present to keep the app
 
 # Translations
 
-The project is translated on [Transifex](https://www.transifex.com/projects/p/syncthing-android/).
+The project is translated on [Hosted Weblate](https://hosted.weblate.org/projects/syncthing/android/).
 
 ## Dev
 
-Language mappings are defined in `.tx/config`, with the second code being the one from transifex. Google play supported languages: https://support.google.com/googleplay/android-developer/table/4419860. Android supported languages: https://stackoverflow.com/questions/7973023/what-is-the-list-of-supported-languages-locales-on-android. If a new language is added on transifex that's not supported, add them to `deleteUnsupportedPlayTranslations` in `app/build.gradle`.
+Language codes are usually mapped correctly by Weblate itself.  The supported
+set is different between [Google Play][1] and Android apps.  The latter can be
+deduced by what the [Android core framework itself supports][2].  New languages
+need to be added in the repository first, then appear automatically in Weblate.
+
+[1]: https://support.google.com/googleplay/android-developer/table/4419860
+[2]: https://android.googlesource.com/platform/frameworks/base/+/refs/heads/main/core/res/res/
 
 # Building
 

app/lint.xml

@@ -47,7 +47,7 @@
     </issue>
     <!-- Ignore lint on ... not being replaced by the ellipsis character -->
     <issue id="TypographyEllipsis" severity="ignore" />
-    <!-- Don't fail lint on translation errors, they have to be resolved on transifex -->
+    <!-- Don't fail lint on translation errors, they have to be resolved on Weblate -->
     <issue id="ImpliedQuantity" severity="warning">
         <ignore path="src/main/res/values-fr" />
         <ignore path="src/main/res/values-pt-rBR" />