Lingua Franca

Etymology
See.

Proper noun

 * 1)  Sabir, the Italian-based pidgin that served as a common language of Mediterranean trade around the 11th-19th centuries.

Usage notes

 * Formerly the language's most common English name, Lingua Franca is now usually referred to as or the  in order to avoid confusion with the generic term.
 * Traditionally, not prefaced by "the".