Language preferences on a per user basis?

[KonradHoeffner]

First, thank you for this awesome application. Our users at the SNIK project are very impressed at how clean it looks.

However, our user base consists of both English and German speakers. Is it possible to save the language preference on a per-user basis so that an English speaker can choose to sees English labels preferably and a German speaker the German literals, in case both exists? I know there is this option to select between different literal languages but after reload it resets and this also applies to the title.