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.
Aranese dialect
In 2006, a new Statute of Autonomy of Catalonia was promulgated. Concerning Aranese, article 6.5 of the organic law establishes that "the Occitan language, called Aranese in Aran, is the language of this territory and is official in Catalonia, in accordance with the provisions of this Statute and the laws of linguistic normalization." In 2010, Law 35/2010 was subsequently passed and concerning Aranese in Catalonia reflecting the new constitutional framework.