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 independence movement
Following elections in 2003, the moderate nationalist Convergència i Unió (CiU), which had governed Catalonia since 1980, lost power to a coalition of left-wing parties composed of the Socialists' Party of Catalonia (PSC), the pro-independence Esquerra Republicana de Catalunya (ERC) and a far-left/Green coalition (ICV-EUiA), headed by Pasqual Maragall. The government produced a draft for a new Statute of Autonomy, which was supported by the CiU and was approved by the parliament by a large majority. The draft statute then had to be approved by the Spanish parliament, which could make changes; it did so, removing clauses on finance and the language, and an article stating that Catalonia was a nation. When the amended statute was put to a referendum on 18 June 2006, the ERC, in protest, called for a "no" vote. The statute was approved, but turnout was only 48.9%. At the subsequent election, the left-wing coalition was returned to power, this time under the leadership of José Montilla.
The Partido Popular, which had opposed the statute in the Spanish parliament, challenged its constitutionality in the Spanish High Court of Justice. The case lasted four years. In its judgement, issued on 18 June 2010, the court ruled that fourteen articles in the statute were unconstitutional, and that 27 others were to be interpreted restrictively. The affected articles included those that gave preference to the Catalan language, freed Catalonia from responsibility for the finances of other autonomous communities, and recognised Catalonia as a nation. The full text of the judgement was released on 9 July 2010, and the following day a protest demonstration organised by the cultural organisation Òmnium Cultural was attended by over a million people, and led by José Montilla.