What Most People Don't Know About Sign Language
As the daughter of a deaf father and a hard-of-hearing mother, I was raised on American Sign Language. That doesn't mean I can understand any other versions.
By Lilit Marcus

And that’s one of the biggest problems with educating people about the Deaf community — simply saying “sign language” isn’t sufficient. It’s like saying a movie’s dialogue was “in Asian.” It has simply never occurred to most people that deaf people in different countries might communicate in different languages, even though hearing people in those different countries can’t communicate with each other. I make a point of saying “I know American Sign Language” to people, which means that at least half the time the follow-up comment is “Wait, so there are other ones?”