I read from here: http://www.question2answer.org/qa/22244/how-can-the-user-switch-the-language-of-the-q2a-forum to install Q2A for each language and point all to one database, but can this work in the long run or will it eventually crash the site?
I would like to have multiple languages in the Q2A (eg. German question, English answer, etc.), I just need the menu, pages, etc. to be English in English site, Russian in Russian site, etc. And no Google translate if possible.