There are dedicated French Total War forums.

This one's okay: http://www.totalwar.fr/forums/index.php?act=idx

But, it lacks scale. You just can't beat a site or a forum that can draw from an English language fan-base.

And once you accept you're on an English site, there's little point in taking away it's strength. People are here precisely because it's in English, because of the global reach of the language. Fragmentizing it into lots of tiny language compartments would defeat the very reason for coming to this site in the first place.