Caló (English: /kəˈloʊ/; Spanish: [kaˈlo]; Catalan: [kəˈlo]; Galician: [kaˈlɔ]; Portuguese: [kɐˈlɔ]; French: [ka.lo]) is a mixed language spoken by the gitanos of Spain and the ciganos of Portugal. In Romani linguistics, it is considered a Para-Romani language based on Romance grammar, with an adstratum of Romani lexical items, through language shift by the Romani community. It is said to be used as an argot, or a secret language, for discreet communication amongst Iberian Romani. Catalan, Galician, Portuguese, and Spanish caló are closely related varieties that share a common root.
Spanish caló, or Spanish Romani, was originally known as zincaló. Portuguese caló, or Portuguese Romani, also goes by the term lusitano-romani; it used to be referred to as calão, but this word has since acquired the general sense of jargon or slang, often with a negative undertone (cf. baixo calão, 'obscene language', lit. low-level calão).