Русский язык трудный?

Nope. Chinese is the easiest one. True, characters and tones are kind of hard to internalize, but then there is NO GRAMMAR! Words don't change, there is no "idet-shla" problem. There would be a separate word for "walking", another one for "Feminine", and another one for the Past Tense. And they just go one after another, like beads on a string. Hungraian is the most difficult one, even more difficult than Russian.