I have never used sign language, but I'm ready to learn it. I know few letters of the alphabet now.
I know that sign language is different for every country, meaning that using American Sign Language in, like, Italy or something will prove useless.
I don't exactly know too much, but I had read that Deaf people's cultures were not respected because they were thought of not being psychologically or mentally capable of learning or communicating without hearing. Thankfully, positive attitudes toward deaf people have increased