u/Eroxene

Hi / Holà

Friends and I are planning a week in Barcelona this summer. I've studied Spanish (Castilian) in secondary school and according to a Colombian friend, I'm speaking the language decently. She said I'd do just fine alone in Madrid. But since we're going to Barcelona, will people speak Castilian or Catalan? Sorry if the question looks silly, I just want to know if I need to learn some Catalan before we go or if Castilian is fine.