* Polyglot: This is the most common term and refers to someone who knows and is able to use several languages. It doesn't specify a particular number of languages.
* Hyperpolyglot: This term is used to describe someone who knows and is able to use a very large number of languages, usually more than 6.
* Multilingual: This term simply means someone who speaks more than one language. It doesn't specify the level of fluency.
* Linguistically gifted: This term can be used to describe someone who has a natural talent for learning languages and is able to become fluent in many languages.
There are many people around the world who know more than 3 languages fluently. Some notable examples include:
* Ziad Fazah: A Lebanese man who claims to speak over 58 languages.
* Emil Krebs: A German diplomat who was known to speak over 68 languages.
* Ken Hale: An American linguist who spoke over 40 languages.
It's important to note that fluency is subjective and varies depending on the context. Someone who is considered fluent in one language might not be considered fluent in another language.