From what I know of JAR-FCL 1 (admittedly not my preferred read), I can't see any reason why not... It would probably be cheaper if you happen to be there for a few days anyway (or if it doubles up with some planned holiday). The only limiting factor as far as France is concerned is that most PPL flight training is done in aeroclubs, NOT flying schools (it's cheaper since they don't charge VAT), and therefore the instructors, while English-speaking, may not be used to teach in English. Also, you would need to become a member of your chosen aeroclub. Membership is around 150-200 Euros for one year, so unless you are planning to go back to do some more flying (hour building for instance), it would be a waste. Also, at uncontrolled airfields (and controlled airfields out of ATC hours), only French is used on the frequency.
Cheers