Languages of Catalonia
According to the government of Catalonia, Spanish, locally known as Castilian, is currently the most spoken language in Catalonia (45.9% daily users of Spanish vs. 35.6% daily users of Catalan vs. 11% daily users of both Spanish and Catalan) and especially in the Barcelona metropolitan area, as well as native language and usual language of many Catalan citizens. This language is widely prevalent in the press, cinema and in daily life.
Catalan manual alphabet
The Catalan manual alphabet is used in Catalan Sign Language but wasn't officially recognized as one of Catalonia's official languages until 3 June 2010 when Law 17/2010 of the Catalan sign language (LSC) was approved by the government. The Catalan manual alphabet is single-handed and is extremely similar to the Spanish manual alphabet. As a result, people who use Spanish Sign Language can understand approximately up to 80% of the Catalan sign language.