What structure/method are you using for a multilingual forum ?

[lmgc]

Hi every body, specialy thoses who are managing a multilingual forums

as you know the forums with many langages have more traffic then the others,
for that i decided to add more langages to my forum wich is in french.

i would to know how you are structuring your forums with many langages,
are you using sub-categories/forums for non principal langage or different vbulletin installation for each langage ?

personaly i was searching for tool/hack to translate forums/categories name's but the vbseo team explained to me that will have a bad effect on the SEO.