Korean is much easier than it seems, at least reading it. There is a great youtube video that explains it very well. If you are interested, I can see if I can find it for you.
I can only say two things in Arabic. Phonetically, they are - nee km mo, and nee km mok.
They are both very rude one is a commonly said rude expletive concerning copulation with ones mother, the other pertains to undergoing this process rather rudely and precisely. I am not sure which is which. They were taught to me by an Arabic co-worker about 30 years ago.
Actually, in Korean you can say - she bar seki - this is also very rude, I am not sure of the exact translation, but I think that it also has to do with the act of copulation.
I do know some other Korean, but none as useful as words that can send a drunk stranger into a fit of rage.