My wife is a francophile. She speaks French fluently. Studied it in college. Has a masters in French linguistics. Lived in Montreal for a while, and we spent some time in Strasbourg. She reads French books and we sometimes watch French movies.
We watched this one in the theater when it first came out. We had no idea what it was about. It is a good one. I bought it on DVD. It is a freaky thriller with lots of good twists. You can read my full review here.