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.
Languages of Catalonia
The Spanish language developed from Vulgar Latin in the North of the Iberian Peninsula, expanding quickly to the South. It has lexical influences from Arabic and possible substrate influences from Basque and (to a lesser extent) Celtiberian. It has been the only official language in Spain for most periods since the eighteenth century.