Here's a breakdown:
* Catalan: The native language of Catalonia, where Barcelona is located. It's the language you'll hear most often on the streets, in local shops, and in everyday conversations.
* Spanish: While Catalan is the official language, Spanish is widely spoken and understood due to its status as the national language of Spain. You'll find Spanish used in government, education, and media.
* English: English is becoming increasingly common, especially in tourism-related areas.
It's worth noting that many people in Barcelona are bilingual in Catalan and Spanish, and you'll often hear them switching between the two languages depending on the situation.
So, while the "official" language of Barcelona is Catalan, you'll be fine communicating in Spanish as well, and English will be useful in tourist areas.