You would be called any of the following, depending on the situation:
A teacher who teaches deaf children sign language is typically called a sign language instructor or a sign language teacher for the deaf.
Sign language Teacher/Instructor
They would be called teachers or instructors.
Yes, you have to be able to speak at least one language.
This would be a teacher or an assistant.
A person who can speak more than one language is called a polyglot.
No, Italians speak a Romance language called Italian.
If you don't know what he wanted it is hard to answer your question as we certainly don't know what he wanted.
a language called Chinook
Speak to the teacher about it, if it continues then report it to the principal.
The English speak countries want English be the world language
people speak PORTUGESE the place is called Portugal
Their native language (which is also called Bith)
"Semitic" is the name of a language family, not one language in particular. So yes, you can learn to speak Hebrew or Arabic, and would be able to speak a Semitic language, but you would not be speaking a language called Semitic.