Languages extinct in the 15th century

stage of the English language from about the 12th through 15th centuries

medieval stage of the Greek language

form of Latin used in the Middle Ages

extinct language

form of the Turkish language spoken in Anatolia from the 11th to 15th centuries

extinct North Germanic language spoken by Norse settlers in Greenland

language

extinct Turkic language spoken in Central Asia from 9th to 15th centuries

Judaeo-Aragonese (Aragonese: Chodigo-Aragonés) was a Judaeo-Romance language, a Jewish language that was derived from Aragonese. It was used by Spanish Jews in north-central Spain from the mid-8th century to the 1492 Alhambra Decree, which expelled Jews from Spain. Later, it either merged with the various Judaeo-Spanish dialects or fell out of use because of the far more influential Judaeo-Spanish.

Franco-Italian, also known as Franco-Venetian or Franco-Lombard, in Italy as lingua franco-veneta "Franco-Venetan language", was a literary language used in parts of northern Italy, from the mid-13th century to into the 15th century. It was employed by writers including Brunetto Latini and Rustichello da Pisa and was presumably only a written language, and not a spoken one.