We go to Europe several times a year and the only time language is ever really an issue is in Paris. Even then it’s more about customs than the language.
Barcelona reminds me of Miami when it comes to language. Most of the people in the touristy areas know English and even if one person doesn’t know it then someone on staff will.
The only place in Europe that we used dollars was in Russia. We either pay a little more and get euros from our bank before we go or get them out of the atms once we are there.
