Lingua franca

[Sarah]

The commercial language of the Levant, -- a mixture of thelanguage of the people of the region and foreign traders.

[Kit]

A language used as vernacular for communication amongst many speakers of different languages, i.e. a [creole].
An early version of this, a mix of English, Spanish, Portuguese, Arabic and other languages with Italian.
(British) The English variant used by many Asian immigrants, mixing English with Indian tongues like [Gujarati], Urdu/Hindi, [Sinhalese], etc.