This will never work, the Dutch word Meid which actually means Maid is translated to Girl in English (which is the correct translation because we use it in this context) however the word Meid is translated to Maid in Russian which really upset my girlfriend when see translated my mothers facebook reply . However I like the idea of having different languages, I suggest that there will be an application form for different language chats e.g. the dutch chat type /ch dutch and you can speak in dutch to all dutch people in the server. first make a try with all europian languages (Dutch, French, German, Spanish, Polish, Swedish, Norwegian, Denmarks, Rusian, Lituanian and so on about 15 languages total) after this test you could add turkish, arabic and what so ever.
Like most have said, this would be very hard to make and maintain, perhaps if we found a good enough translator, it could be added to the forums, like an in-forums translator that would let you translate it right when your viewing the post. People could easily chat in their languages, and everyone else would just tap the "translator" button and view it in their language. Of course, you'd need to find a reliable translator, but it's a whole load easier then making an entire new website.