a lingua franca

a language that is used for communication between people whose main languages are different (often + of ) English is the undisputed lingua franca of the business world.

Common Names:

Name	Pronounced	Usage
Athey	['æθi]
Lennard	LEN-ərd	English (Rare)
Tim	TIM (English, German, Dutch, Slovene)	English, German, Dutch, Slovene, Swedish, Norwegian, Danish
Hiroshi	hee-ṙo-shee	Japanese
Francene	[fræn'si:n]
Zoja	ZOI-ah (Polish)	Polish, Macedonian