Default Locale

Your computer does not have the local language
You want to change the system language of the ROM
Android applications are multi-language support, however, it depends on the ROM developers and hardware distributor. So sometimes your computer can not run the application in the language you wish to
With this application all things are possible
p/s:
android 4.2+
download android adb tool
https://drive.google.com/file/d/0B4NaXtAsqN0PXy1pYWp2T29fd0U/view?usp=sharing
open USB debugging
open command
adb shell
pm grant vn.smart.locale android.permission.CHANGE_CONFIGURATION