I'm managed to find the first nine (or at least I think they're the first nine, I don't know French!) and I was wondering if anyone out there knows or could find out if I could get the rest or however many more there are translated in French. Thanks!

I checked amazon.fr, and the first ten books are listed, but not all are available. (The first isn't, or I'd have ordered it.) I also checked ebay.fr, but the only copies there are in English.

I finally managed to procure a copy of the first volume in french. You just have to check back periodically.