Feature summary (what you would like to be able to do and where):
AOSP documentation: https://developer.android.com/guide/topics/resources/app-languages

Starting from Android 13, Android apps can opt in per-app language preferences which allows users to change app's interface language in settings.

Benefits (why should this be implemented?):
User can set a different interface language from the system language for the app. This is especially useful for translators.