Judaeo-Spanish, also known as Ladino, is a variety of Spanish which preserves many features of medieval Spanish and Portuguese and is spoken by descendants of the Sephardi Jews who were expelled from Spain in the 15th century.Conversely, in Portugal the vast majority of the Portuguese Jews converted and became 'New Christians'. Therefore, its relationship to Spanish is comparable with that of the Yiddish language to German. Ladino speakers today are almost exclusively Sephardi Jews, with family roots in Turkey, Greece, or the Balkans, and living mostly in Israel, Turkey, and the United States, with a few communities in Hispanic America. Judaeo-Spanish lacks the Native American vocabulary which was acquired by standard Spanish during the Spanish colonial period, and it retains many archaic features which have since been lost in standard Spanish. It contains, however, other vocabulary which is not found in standard Spanish, including vocabulary from Hebrew, French, Greek and Turkish, and other languages spoken where the Sephardim settled.
Judaeo-Spanish is in serious danger of extinction because many native speakers today are elderly as well as elderly olim (immigrants to Israel) who have not transmitted the language to their children or grandchildren. However, it is experiencing a minor revival among Sephardi communities, especially in music. In the case of the Latin American communities, the danger of extinction is also due to the risk of assimilation by modern Castilian.
A related dialect is Haketia, the Judaeo-Spanish of northern Morocco. This too tended to assimilate with modern Spanish, during the Spanish occupation of the region.