Используйте приложение APKPure
Историческую версию Zawgyi Locale можно получить на Android
Zawgyi locale changer for Samsung and android devices
This app can change System Locale to English(Zawgyi).
*need PC and run this command from adb
'adb shell pm grant j.o.y android.permission.CHANGE_CONFIGURATION'
This command also include in app.