The most difficult language? On the internet, you often see people claim that language x is the hardest to master, for whatever reasons. Obviously, there is no such thing as the most difficult or easiest language because we're all influenced by our native language and the languages we've already been learning, so that structures of a new foreign language may or may not be totally strange for us. A lot of people say Japanese or Chinese is the most difficult languages in the world, for there are thousands of characters to remember in their writing systems. I can easily neglect that. How does the writing system make the language harder? You can learn a language while not caring for its writing system, you can write Chinese using Latin characters, a language in the linguistic sense is what its speakers speak, after all. Beyond that, there are thousands of languages in the world, nobody can possibly compare them all. I also think that the most difficult language wouldn't spread very well, thus not get well-known. Noam Chomsky once said that language plays an important role as an instrument of social classification in small language communities. In tribal communities, it is typical that members of it are valued by their rhetorical skills and language creativity. In such an environment, I would expect the most complex languages to develop. I've been doing a lot of reading on linguistics out of personal interests. There are extremely complex languages in tribal communities of the Americas, Africa, Australia and Asia I've now heard of. I am quite sure that Chinese, Japanese, Arabic and Finnish aren't the most difficult languages for you, no matter what your background is. I encourage you to just do your own research, find out about the difficulties of the Taa language, Navajo, Copainalá, Khoikhoi, the family relations in Australian languages or word coining in East African and Brazilian languages.