Trolls are sometimes depicted as dumb, stupid, and incompetent, yet they have an entire language, which is something that most beasts lack. Some believe that this language is nothing more than a lot of groaning and pointing. This is not true at all. Troll, the language, is very complex and complicated. Even the smallest change in tone can make a word entirely different.
But, once you get past all the complexity of Troll, it is very simple and quite easy to master. There is also a great deal of body language involved. Notable Troll speakers include Barty Crouch Sr., Percy Weasley, and Albus Dumbledore.