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.
Popular Unity Candidacy
The CUP defends the unity of the Catalan-speaking areas, or Catalan Countries, which they believe should be allowed to constitute an independent republic, according to the principles of self-determination. The CUP is also strongly in favor of the Catalan language, which should be the "preferential and common language" of the areas where it is traditionally spoken. Still, the 2012 CUP program refers to the advantages of multilingualism and encourages debate on the status that an independent Catalonia would grant to French and Spanish.