Languages of Catalonia
The main cause of Spanish and Catalan social bilingualism in modern Catalonia was large-scale migration from the rest of Spain during the 20th century, as Catalonia started a significant industrialization which demanded an increased workforce from elsewhere. Spanish has historically been spoken among a minority of civil servants born in other regions in Spain and among segments of the wealthiest bourgeoisie. Spanish has also been spoken as a second language by most Catalans, as it has been the only official language over long periods since the eighteenth century.
Languages of Spain
The languages of Spain (), or Spanish languages (), are the languages spoken or once spoken in Spain. Romance languages are the most widely spoken in Spain; of which Spanish, or Castilian, is the only language which has official status for the whole country. Various other languages have co-official or recognised status in specific territories, and a number of unofficial languages and dialects are spoken in certain localities.