The currency used is the euro. You can exchange foreign currency at banks and pay by credit card in most places.
Language
The official languages are Spanish and Catalan, with some expressions typical of southern Catalonia. People who work with the public are often fluent in English.
Internet
Most public buildings and spaces have free Wi-Fi hotspots. Coverage is very good in hotels.
Weather
The climate is dry. Summers are warm and very sunny. The temperature ranges between 4⁰C and 29⁰C over the year.