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.
Catalan language
In Alicante province, Catalan is being replaced by Spanish and in Alghero by Italian. There are also well ingrained diglossic attitudes against Catalan in the Valencian Community, Ibiza, and to a lesser extent, in the rest of the Balearic islands.