Stack Overflow is, by design, an English-only site. Every non-English question will be closed in minutes as "too localized." But still some users think that if something is not mentioned in the FAQ, then it is allowed. So, how about fixing that?
Do we really need a NO ELEPHANTS sign?
I mean, isn't such a thing obvious? Would you go to a forum where everyone was communicating in French and type
Hey French Dudes, I got a question but I don't know French so I'm just going to go ahead and ask it in English anyway?
Perhaps so, just to make it explicit. Although it is probably pretty obvious on hitting the homepage.
edit: oh yeah, and I wonder how many people read the FAQ before posting anyway...
It should be clearly mentioned that the forums are english only. Despite the fact that it's pretty clear at first glance that all the content is in englsih, people that do not know the language may be inclined to try and ask a question in their language in hope they find someone who understands them and can answer them. Having a clear indication that such behavior is against the rules may discourage this and it reduces "spam". You can always use Google Translate if you really need to get something answered and you don't know english.