* Fix duplicated language entries from system and app language sets.
Closes#2900
* Prefer modern language codes.
Closes#2903
* Synchronize per-account default posting language with server.
Closes#2902
* Allow users to post in languages android doesn't know about yet (e.g. toki pona)
* Always put the preselected language at the top of the list
Levi Bard