Per app language settings

Android 13 introduces a way to pick one language per app that differs from the system-wide language.
 
https://developer.android.com/about/versions/13/features#app-languages
 
In Android 13, there are two ways to choose one language per app:

• System settings let users select a preferred language for each app in a centralized location.

• APIs that let apps set a different language at runtime to use in their user interface.

Note that:

Apps that use custom in-app language pickers should use these new APIs to ensure that users have a consistent user experience regardless of where they select their language preferences. The new APIs also help you reduce the amount of boilerplate code, support split APKs, and support Auto Backup for Apps to store app-level user language settings.

This will, probably, require some changes to how the language is selected on Android.