If I learn German and French, will my visit to Europe be a lot more enjoyable?

If you learn french then im sure you will get a lot more from the visit. As for german however, it could add to the experience, however it is not necessary. In germany children are required to learn english from the time they are in 5th grade until they graduate, so every german knows some english, however, if they choose to use it, is up to them. Just know that it is mainly the older generation that refuses to use english. (hope this helps you decide)