Default [Q] Adding another language over morelocale 2 doesnt work. Solutions?

Hi All,

I am trying to add another language to my Samsung SM-G3858 projector Smartphone. First thing I tried is to install morelocale 2 but it didnt work. Then I tried to do it over adb with command:

pm grant jp.co.c_lis.ccl.morelocale android.permission.CHANGE_CONFIGURATION

as seen here: http://droider.eu/2013/11/03/how-to-...4-2-and-above/

Didnt work either. I have root and run on 4.2.2 JB. When I for example choose German or any other language with morelocale the downloaded apps are translated fine (like googleplay), but not the system language. All the system apps and the menu of these apps (e.g. settings) remain english. Also tried to contact the dev of morelocale 2 but no answer. So Im stuck. I guess there is some kind of region lock on that phone (chinese build). Now how can I override that lock? Any help would be greatly appreciated!