Can't change menu languages

xili-language is able to answer on most of the huge countless themes . BUT, it is necessary to analyze the theme wp php code and decide where to hook, filter or code (xili-language itself is also hook able). But with basic functions provided in settings or with examples of child themes (twentyten and twenty eleven), the webmaster coder is able to better understand how to work and to adapt.

In your case, is your theme Breathe (with e at end) or another free or commercial theme ?