Multilingual (adjective)

Able to speak or write multiple languages fluently.

Origin:

From multi- +‎ linguistic, from latin lingua ("tongue, languag.e")

Examples:

1. The United Nations is a multilingual organization, with staff speaking many different languages.
2. She is multilingual and can speak English, Spanish, French and German fluently.
3. The city of Brussels is known for being a multilingual city, with many people speaking both French and Flemish.
4. He was impressed by her multilingual skills, knowing that she could speak 7 languages fluently.
5. Multilingual individuals tend to have a better understanding of different cultures and customs.