A more thorough explanation:

An interpreter is a person who translates spoken or signed language from one language to another. They help people who speak different languages communicate with each other.

For example, if someone who speaks Spanish needs to talk to someone who only speaks English, an interpreter can help them understand each other. In legal settings, an interpreter may be needed to translate the testimony of a witness who speaks a foreign language or is deaf.

Interpreters play an important role in breaking down language barriers and facilitating communication between people who would otherwise not be able to understand each other.