This is a very successful wiki. Some of the users speak multiple languages. I only speak a very small language so it is not a lot of help but you may need pages translated into French, Italian, Russian, etc. That is my suggestion.
I mean more languages like Romanian, Bulgarian, Armenian, Irish, Portuguese, Japanese.
Or Greek, Slovak, Swiss, etc.
I also think there should be a project language so that there is more focus of adding the same page in other languages on the bottom of the page, in all other languages that has that page.
Also Italian and French.
Like Ciencia said. There's already wiki's in other languages.