castellano (etymologically) is the equivalent of the English word Castilian, which can refer to the variety of Spanish spoken in central / northern Spain. Catal

castellano (etymologically) is the equivalent of the English word Castilian, which can refer to the variety of Spanish spoken in central / northern Spain. Catalan is a distinct Romance language. As for the use of castellano for Spanish-in-general see e.g. https://spanish.stackexchange.com/questions/913/is-there-a-difference-between-espa%C3%B1ol-and-castellano-hay-alguna-diferen https://spanish.stackexchange.com/questions/913/is-there-a-d...