What do you call people who speak 3 languages?

There isn't one specific term for people who speak three languages. However, here are some options you can use:

Formal:

* Trilingual: This is the most common and accurate term. It literally means "three languages."

* Polyglot: This term refers to someone who speaks multiple languages, including three.

* Multilingual: This term is broader and refers to anyone who speaks more than one language.

Informal:

* Triple-tongued: This is a playful and informal way to describe someone who speaks three languages.

Ultimately, the best term to use depends on the context and your audience.