changing language for users doesn't work

[Eric Doutreleau]

Hi

I m using fedora15 with latest update and i can't change language for users.

my computers are installed in french
but if i change the language in the section my account  and i set it to 
italian for exemple when i relog i have always the menus in french and 
not in italian.

Worse if i go to my account again it s written that italian is my 
language but all the menus are still in french.

Does someone know how to solve that problem?