From our FAQ
What kind of questions can I ask here?
German Language and Usage - Stack Exchange is for students having questions about German, expert speakers of German wanting to discuss the finer points of the language and translation questions from any language to German.
I looked a bit around into the FAQs oft the other new language sites currently in beta
https://japanese.stackexchange.com/faq
https://french.stackexchange.com/faq
and found no similar sentence. That can be because the FAQ is still just the default stackoverflow FAQ and has not been modified or it is the intension of the site not to allow such questions.
Does anyone remember, how this got into our FAQ?
Note: I see no problem in allowing such questions here. I'm more general interested in where to ask translation questions from German into other languages.
I know that http://area51.stackexchange.com/proposals/16613/languages intends to aloow such questions.