Languages of Catalonia
According to the government of Catalonia, Spanish, locally known as Castilian, is currently the most spoken language in Catalonia (45.9% daily users of Spanish vs. 35.6% daily users of Catalan vs. 11% daily users of both Spanish and Catalan) and especially in the Barcelona metropolitan area, as well as native language and usual language of many Catalan citizens. This language is widely prevalent in the press, cinema and in daily life.
Catalan language
The word "Catalan" is derived from the territorial name of Catalonia, itself of disputed etymology. The main theory suggests that (Latin "Gathia Launia") derives from the name "Gothia" or "Gauthia" ("Land of the Goths"), since the origins of the Catalan counts, lords and people were found in the March of Gothia, whence "Gothland" > "Gothlandia" > "Gothalania" > "Catalonia" theoretically derived.