Are you going to teach me what language predominates in Catalonia and in the Basque country? Seriously? (I am Catalan of Basque descent). Catalan is spoken and understood (mainly because it's almost a dialect of Spanish, it is so similar) but Basque's situation is similar to the one of Irish, taught at school but only spoken commonly in remote areas. If you want further proof, check this referenced statement from the Spanish Wikipedia (article Cataluña): El castellano es la lengua más hablada de Cataluña, superando al catalán no sólo como lengua habitual,20 sino también como lengua materna18 y de identificación,19 tanto en cifras relativas como absolutas.. I'm reverting to the map that makes more justice to the current situation of European languages.