Explanation:

Ans. Polygot

A person who knows foreign languages is called a linguist, polyglot, or bilingual. 
Linguist
A linguist is someone who is good at speaking or learning foreign languages. 
Linguists study all aspects of language, including grammar, vocabulary, the sound of language, and how words change over time. 
Polyglot
A polyglot is someone who speaks, uses, and understands several languages. 
The term "polyglot" is often used to describe people who can speak more than three languages. 
The prefix "poly-" means "more than one" and the "-glot" comes from the Greek word for "tongue". 
Bilingual 
A bilingual person speaks two languages fluently.
If you speak three languages, you're trilingual.