what do you call a sign language interpreter

A sign language interpreter is a person who is not only bilingual but has also received specialized training and credentials to develop the skills and expertise needed to mediate meanings across languages and cultures. They are professionals who have passed either a state or national level of certification and are bound by a strict Code of Professional Conduct as established by the Registry of Interpreters for the Deaf. It is important to note that not everyone who knows American Sign Language (ASL) or the manual alphabet is qualified to be an interpreter. A signer is a person who can communicate conversationally with people who are deaf or hard of hearing, while an interpreter is a person who has received specialized training and credentials to interpret across languages and cultures. Some other terms that are sometimes used to refer to sign language interpreters but are incorrect include signer, helper, translator, and ASL specialist.