Android 13 : enable app specific language for all apps

In Android 13, you can define the UI language per app.
By default, the developer should have allowed this feature, otherwise the app will not be shown in settings menu.
By running the following adb command, it is possible to enable app specific language for all apps.

adb shell settings put global settings_app_locale_opt_in_enabled false

Source : https://www.reddit.com/r/Android/comments/wrlgh2/how_to_make_every_app_appear_in_android_13s_new/