[smeej]

Well and French Sign Language is very different from ASL.

I had a friend who grew up a hearing child of Deaf parents, with two hearing older siblings, so he learned ASL and (American) English in tandem.

By the time I knew him, he also spoke French and French Sign Language because he'd been living in France for several years, and he had fun explaining and showing us some of the differences with his Deaf French friends.