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.
Sant Lluís
Like the rest of Spain, almost every native resident is able to speak Spanish, (sometimes referred to as Castilian). However, the majority of the population can also speak Catalan, which is spoken throughout Catalonia, Valencia, and the Balearic Islands, and even has its own dialect spoken on the island, menorquí, a variant of the Balearic dialect; widespread throughout the Balearics.