linguist
It is a linguist.
they are called an interperter or translater
A linguist is a person who is an expert in language or languages, including the structure, meaning, and use of languages. They often study the historical development of languages and their significance in different cultures.
A person who studies body language is called a kinesics expert or a body language analyst. They specialize in nonverbal communication cues such as facial expressions, gestures, and posture to understand underlying emotions and intentions.
A language expert is called a linguist. Linguists study the nature of language, its structure, and its use in communication within a specific cultural context.
A language expert is commonly referred to as a linguist. Linguists study the structure and usage of language, including grammar, syntax, semantics, and phonetics.
a semanticist
A person can become an IP expert with some hard work and dedication. A person can become an IP expert by taking courses that deal with IP. A person can also become an expert by obtaining hands-on experience.
The experience of the expert, the educational background of the expert, and the ability of the expert to talk in clear, concise language. There may be more, but this is all I know.
A grammatical person is a person who teaches or who is expert in grammar.
A person can become an Expert contributor in Wikianswers by asking and answering a lot of questions.
A person that was working under an expert trader was called a apprentice.