Mediterranean Lingua Franca
The Mediterranean Lingua Franca, or Sabir, was a contact language, or languages, that were used as a lingua franca in the Mediterranean Basin from the 11th to the 19th centuries. April McMahon describes Sabir as a "fifteenth century proto-pidgin" and "a relic of the original Lingua Franca, a medieval language used by Mediterranean traders and by the Crusaders." Operstein and McMahon categorize Sabir and "Lingua Franca" as separate but related languages.