lin·gua fran·ca
noun/ˌlɪŋɡwə ˈfræŋkə/
/ˌlɪŋɡwə ˈfræŋkə/
(plural lingua francas)
[usually singular] (linguistics)- a shared language of communication used between people whose main languages are different
（母语不同的人共用的）通用语 - English has become a lingua franca in many parts of the world.
英语在世界上许多地方都成了通用语。
Word Originlate 17th cent.: from Italian, literally ‘Frankish tongue’. - English has become a lingua franca in many parts of the world.