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 Latin American communities, the danger of extinction is also due to assimilation by modern Spanish. 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. Writing system Spanish is written in the Latin script, with the addition of the character (, representing the phoneme , a letter distinct from , although typographically composed of an with a tilde). Formerly the digraphs (, representing the phoneme ) and (, representing the phoneme or ), were also considered single letters. However, the digraph (, 'strong r', , 'double r', or simply ), which also represents a distinct phoneme , was not similarly regarded as a single letter. Since 1994 and have been treated as letter pairs for collation purposes, though they remained a part of the alphabet until 2010. Words with are now alphabetically sorted between those with and , instead of following as they used to. The situation is similar for . Thus, the Spanish alphabet has the following 27 letters: Since 2010, none of the digraphs () are considered letters by the Royal Spanish Academy. The letters and are used only in words and names coming from foreign languages (, etc.). With