for wp and wpmu, because your site is one of both. BP is only a plugin collection, NDD !
http://wpml.org/
tu lis le french ? il existe ce tuto
http://www.eoxia.com/site-web/wpml-wordpress-multilangues/
I installed the one and also the plugin which is here on this site but I get this error:
Fatal error: Call to undefined function get_blog_list() in /var/www/buddy/wp-content/plugins/buddypress-multilingual/sitepress-bp.php on line 78
??
jozik has made some great job, wondering is this could be used in BP-Core yet ?
check this:
http://enlimbo.net/
https://wordpress.org/extend/plugins/buddypress-multilingual/
http://wpmu.enlimbo.net/
Please let me know if this works fine with latest BP 1.2.2