Since I started to play CandyCrush Saga, I've always used the French (Canada) version, as per my Facebook.
3 days ago, my Facebook still in French but the game changed to the english version and there's no way to bring it back to french.
Actually, I'm at level 3090 and never had such an issue.
I also saw that a change occured in the mailbox, lost 15 games sent by friends, but that's not a problem by itself, can live with it.
Please let me know where the problem is, I'm not interested in playing in english.