You're American. Marketing data says that you like all things French and Italian.
Guess what happens next in this salesforce driven industry?
:)
East of Munich you're best bet is German, but English is also spoken widely. West of Munich you're more or less fine with English. In the northern countries we are used to the fact no one speaks our language so we all speak English, a lot of people French and a lot of German because it's close to our own.
Italians try English. As do most Spanish. Try is the magic word here, it's like your Spanish after high school or my French. :)
French don't try. They speak French. Period. In hotels etc. (tourist spots) English is spoken by few employees. But they are there. :)
In the balkans the situation is mixed. Some parts English, some German, some French, some Russian. I get by with an English/German mix in Croatia. my German is better then my French... But not a lot). Here in the Netherlands my level of German is widely called "steenkolen Duits" (coal German) because it's course, harsh, hard and dirty)
Anyway you'll be fine. Have a great vacation.