Is the fact that Catalán is spoken in Barcelona going to be a problem in my adaptation?
Not likely. First of all, you should know that Barcelona is a bilingual city; Castilian Spanish and Catalán are “co-official” languages and nearly everyone speaks both. Barcelona is a very cosmopolitan and multicultural city which attracts people from all over the world. On a typical day, you may overhear several languages being spoken on the street, not just Spanish and Catalán. Catalán is similar enough to Castilian Spanish so that you’ll be able to understand street signs and lots of words right away. Don’t underestimate your brain’s ability to handle English, Spanish and Catalán all at once!