What is a Lingua Franca?

A lingua franca (lit. Frankish tongue), also known as a bridge language, common language, trade language, auxiliary language, vehicular language, or link language, is a language or dialect systematically used to make communication possible between groups of people who do not share a native language or dialect, particularly when it is a third language that is distinct from both of the speakers’ native languages.

Lingua francas have developed around the world throughout human history, sometimes for commercial reasons (so-called “trade languages” facilitated trade), but also for cultural, religious, diplomatic and administrative convenience, and as a means of exchanging information between scientists and other scholars of different nationalities