We'll need to hire a bilingual assistant
My friend's daughter is bilingual - her father is Spanish and her mother is Polish.
We created a freely available English-Japanese bilingual corpus.
a bilingual dictionary
My brother is not bilingual.
Montreal is probably the most bilingual city in the world – most inhabitants speak English and French.
a person who speaks two languages fluently. bilingualist, polyglot, linguist
With an American father and a French mother, she is bilingual.
Esperanto speakers are in principle still at least bilingual.