Hi!
Normally, you should be able to play all games no matter the langage. But it is important to know that the french games are not available in english, so if you are wondering why you can't change the language, that is the reason.
If this is not what your question is about, can you tell us exactly what happens when you try to play?
If you have any other question, just ask! We'll answer as fast as we can!
Laurie :)