The 'french' guys
I don't know if you've noticed, but the actors playing the french kids talk english with a french accent. But at the restaurent scene, when one of them is supposed to talk french, all that comes out of his mouth sounds nothing like french, except maybe the last word "voila", even though it's said with a terrible accent.
I think it's too bad and takes away a lot of realism (sp?), and I would at least have expected them to pay attention to this detail that's not so minor.