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.
National language
Andorra's national language is Catalan; moreover Catalan is an official language in several territories in Spain (Catalonia, Valencian Community, Balearic Islands), and is spoken (without official recognition or status) in territories in Spain (the Catalan-Aragonese borderlands known as La Franja and the Murcian municipality of El Carche), France (Pyrénées Orientales) and in Italy (Alghero).