As already said, ideally you would need to speak French (it's compulsory on Air/Air freqs., including normally controlled aerodromes outside of ATS hours, and wherever else stated on the
AIP).
As for finding an English speaking instructor... if it's just for a checkout I don't think that's that critical. Go to the flying club once you're there, see if you like them and, more importantly, if they like you, and tell them you would like a temporary membership, etc. I fly a lot in France, but as a French speaker I can't really comment much on the linguistic barrier aspect. In any event, it's an awesome country to fly in.