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.
Culture of Spain
"Catalan", with its "Valencian" dialect is a Romance language, the national language of Andorra, and a co-official language in the Spanish autonomous communities of The Balearic Islands, Catalonia and Valencian Community, and in the city of Alghero in the Italian island of Sardinia. It is also spoken, although with no official recognition, in the autonomous communities of Aragon (in La Franja) and Murcia (in Carche) in Spain, and in the Roussillon region of southern France, which is more or less equivalent to the "département" of the Pyrénées-Orientales.