双语
shuāng​yǔ

bilingual

双语 雙語 shuāng​yǔ
bilingual nounadjective
bilingual; consisting of or using two languages

这是一所双语学校。

zhè shì yī suǒ shuāng​yǔ xué​xiào.

It is a bilingual school.

diglossia
a situation in which two languages or two varieties of the same language are used by the same community
two languages
two different languages, especially when used together or side-by-side (e.g., in broadcasting or publications)