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.
Religion in Catalonia
The Church of Jesus Christ of Latter-day Saints, the major body of Mormonism, has more than 6,000 members and 15 places of worship as of 2014, most of them using Spanish as their liturgical language. Many Mormons in Catalonia are South American immigrants, and this is the reason why Spanish is the primary language of the Mormon communities in the country.