Raina
Cineva de undeva.
Hungary was initially my first choice because I want to visit Budapest (and will probably end up there anyway on this trip) and I didn't really want to travel to Dessau because it looks like the middle of nowhere, but Amorphis, Primordial, Alcest, Watain, Sodom etc convinced me otherwise!
And yes the language part should be interesting, being by myself and not speaking any German.
Nah, you don't have to worry about Germany, unlike Hungary, a lot of people speak English. Plus, they usually have a quite organized transportation system (maps & english directions), easy to follow.