Language /
Polish was chosen the HARDEST LANGUAGE in the world to learn... :D [1558]
Polish was formed as such because it was spoken only by Poles who are high IQ people so the language tends to be complex.Similarly German or Chinese,Japanese are also complex since formed by high IQ people for their needs.Also language reflects national character(German precision where every word means only one thing etc).
On the other hand languages which become international(like English,Spanish etc) lose their complexity because they have to be spoken by non-native folks(colonies etc).So they sacrifice the edges.
The same happened to Greek.Ancient Greek was one of the most(if not the most ever) complicated language on earth spoken in a small region inhabited by high IQ individuals.When Greek became international after the conquests of Alexander the Great it was radically simplified to meet the needs of persons who had never spoken Greek before but now they had to(Syrians,Egyptians etc).So now after 2000 years I have no problem to understand this language although for the ancient Greek language I need dictionary since many words since have changed meaning or vanished at all.But simplified Hellenistic language is perfectly understandable though still more complicated than modern Greek.