Here's a breakdown:
* Catalan: The vast majority of people in the region surrounding Barcelona speak Catalan.
* Spanish: Spanish is widely spoken as well, particularly in areas with greater migration from other parts of Spain.
* Other Languages: You might also encounter other languages spoken by immigrants and visitors, such as English, French, Arabic, and more.
It's important to note that Catalan and Spanish are both official languages in Catalonia. Many people in the region are bilingual, comfortable speaking both languages.