Since the Spanish transition to democracy (1975–1982), <answer>Catalan</answer> has been institutionalizated as an official language, language of education, and language of mass media; all of which have contributed to its increased prestige. In Catalonia, there is no parallel of a large, bilingual, European, non-state speech community. The teaching of <answer>Catalan</answer> is mandatory in all schools, but it is possible to use Spanish for studying in the public education system of Catalonia in two situations, if the teacher assigned to a class chooses to use Spanish, or during the learning process of one or some recently arrived students.  There is also some intergenerational shift towards <answer>Catalan</answer>.
Since the transition, what is the official language?
Catalan