* Polyglot: This is the most common term for someone who speaks multiple languages fluently.
* Linguist: This term refers to someone who studies languages scientifically, focusing on their structure, history, and how they are used. They might specialize in specific areas like phonetics, syntax, or semantics.
* Translator: This term refers to someone who translates text or speech from one language to another.
* Interpreter: This term refers to someone who translates spoken language in real-time, often in formal settings like meetings or court proceedings.
* Language Teacher: This refers to someone who teaches others how to learn and speak a particular language.
The specific term you use will depend on the specific expertise you are referring to. For example, if you are talking about someone who speaks 10 languages fluently, you would call them a polyglot. If you are talking about someone who studies the history of the English language, you would call them a linguist.