Etymology
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Ladino (n.)
1889, a jargon of Spanish mixed with Hebrew, Arabic, and other elements, written in Hebrew characters, spoken by Sephardim in Turkey, Greece, etc.; from Spanish Ladino "Latin," from Latin Latinus (see Latin. The Spanish word also had a sense of "sagacious, cunning, crafty," on the notion of "knowing Latin." The Spanish word also appeared in American English in its Central American sense, "mestizo, lighter-skinned mixed race person" (1850).
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Ladin (n.)
Rhaeto-Romanic dialect spoken in Switzerland and Tyrol, 1873, from Rhaeto-Romanic Ladin (Italian Ladino), from Latin Latinus "Latin" (see Latin (adj.)).
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Latin (adj.)

Old English latin "in Latin," from Latin Latinus "Latin, Roman, in Latin," literally "belonging to Latium," the region of Italy around Rome, a name of uncertain origin. Possibly from PIE root *stela- "to spread, extend," with a sense of "flat country" (as opposed to the mountainous district of the Sabines), or from a prehistoric non-IE language. Old folk etymology connected it with Latin latere "to lie hidden," and a fable of Saturn.

The Latin word also is the source of Spanish and Italian ladino, Dutch latijn, German latein, Irish Gaelic laidionn (n.), Polish lacina, Russian latuinŭ. The more common form in Old English was læden (see Latin (n.)).

In reference to the Roman Catholic Church, 1550s. Used as a designation for "people whose languages descend from Latin" (1856), hence Latin America (1862). The Latin Quarter (French Quartier latin) of Paris, on the south (left) bank of the Seine, was the site of university buildings in the Middle Ages, hence it was the place where Latin was spoken. The surname Latimer means "interpreter," literally "a speaker of Latin."

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