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.
Politics of Catalonia
Catalan nationalist and federalist movements arose in the nineteenth century, and when the Second Republic was declared in 1931, Catalonia became an autonomous region. Following the fall of the Second Republic after the Spanish Civil War of 1936–39, the dictatorship of General Francisco Franco annulled Catalonia's autonomy statute and prohibited any public usage, official promotion or recognition of the Catalan language. Its private everyday use was never officially proscribed by law but diminished because of the political situation, mostly in the major urban nuclei. During the last decade of Franco's rule, there was a resurgence of nationalist sentiment in Catalonia and other 'historic' regions of Spain such as the Basque country.