I install german language and become master lang
 

Hy ,

I have am working on an international forum but with English as master language and I have install other languages available.
Reaching German language from German website see here after insall master language (including administrative) become German. If I select English from menu still German is doing.

Can you please make some suggestions how to revert back to english original pack and have German as a selectable language for front end.
Many thanks in advance