Tic-tac
A person who does sign language is called a "sign language interpreter" if they are interpreting between spoken language and sign language, or a "sign language user" if they communicate primarily through sign language.
A person who does sign language is called a "sign language interpreter" or a "signer."
Anyone can learn sign language, but sign language is mostly associated with deaf and hard of hearing people which is their native language. (Although quite a few don't know sign language and learned language via oralism method.)
The bookmakers signaling system is called tic-tac. It involves bookmakers using hand signals to communicate information about odds, betting movements, and other details to each other across a racetrack or betting ring.
You would be called any of the following, depending on the situation:teacherspecial education teachersign language teacherprofessorteaching assistant
Australian sign language is called Auslan.
sign language
Tic-tac
Scandic Bookmakers was created in 1997.
An interpreter for the deaf is called a sign language interpreter. They help facilitate communication between people who use sign language and those who do not.
People who use sign language are typically called sign language users or signers. They may also be referred to as Deaf or hard of hearing individuals, depending on their hearing abilities.
There is no other name for it I've heard-most call it that.