for me, definitely Korean! The grammar is very very similar to Japanese and also Turkish, but the problem is they never say anything the same way twice! If you learn a word or a sentence/question structure, it's almost useless because they say/ask you the same thing a different way next time! You say 'what's that??' and they go 'oh, it's the same meaning as ...'!! It's so frusrating -and no, I'm not talking about levels of politeness, just regular words/sentences.. It's a nightmare! :)

I'd try a divergent approach to your answer. - Oriental languages also have syllabic alphabets, from Indian to Chinese and Japanese: - I have been striving to memorise the "Iroha" japanese alphabet which is actually meant to be learnt like a song in that particular order, but all my efforts in vanished a part; - People generally approach language studies from a static perspective and easily end up with an input-only method which is where "the best methods ever" all stem out from; - after these experiences we must definitely agree that the only methods that work in learning a foreign language are: being a businessman, a lover or a prophet, that is, where we need to communicate something: - a single word can have 100 meanings when we really need them, as well as a chair has 100 uses when we are actors or we simply need to reach the chocolate on the top shelf. This therefore is an output-approach which is the only one that works for real. Few obstacles lie in this method. I have seen african boys become success singers in China, as well as any immigrant in my country might have rarely seen any grammar besides working here. So the most difficoult language to me is the one we suppose to learn without practising. Otherwise, you should ask this question to businessmen and prophets (since lovers also have other strategies). Bye.

Linear A. You'll have to decipher it before you can learn it. Kay(f)bop(t). You need an extensive collection of hats. Damin and Kallawaya: you have to be initiated into a priesthood before you can learn them.