Finnish, without question. Each verb has 85 conjugations. Consonants change according to the other letters in the word. The length of a letter may be single or double and that makes it a different word. Almost every word is written in a form other than its root stem, making it nearly impossible to look anythign up without first parsing it into what roots it may contain. I swear, if you didn't have written Finnish words an an explanation of the grammar, it would seem to make no sense at all. I wonder if any non-native speaker could learn it. If you are a fanatic language lover like me, Finnish is THE ultimate challenge, the world's hardest crossword puzzle. And it's worth it, it's a beautiful language and the people are great.

chinese

Language of ET

actually, i know a few languages ,maybe chinese .i am a chinese.i think it is a little more complex than other languages.it has pin yin ,bihua and the pronunciation.but the pronunciation is a little like english .it is easy.

Yiddish isnt simply also :s