Europe is linguistically and culturally very diverse, and many residents speak 2-3 languages including English. Tourism is a huge contributor to the economy, so if traveling from North America (where mostly speak English) or Asia (again British English is used in official work) you won’t have any issues. We visited cities like Paris (French), Munich/Nuremberg (German), Seville (Spanish), Lisbon (Portuguese), Brussels (Dutch) - but never had any problems in communicating. If you learn a few words (especially pronouncing the landmarks/names properly) it's helpful when you are trying to get to sites.