double negative turns things in to positive, just like some cases in math.

I will remember this one! What a fun way to see life!

People want to speak shorter and simpler

Oh yes, absolutely. It is a funny and sad thing at the same time. I think it is across languages and we tend to "blame" English, even though I think English is also undergoing this "simplification". Maybe we should blame (i) instant messages/gratification/etc., and (ii) people having less time to focus creating shorter attention spans. I think it is way more complex than that, but we are living in a period, I think, where quasi-simplification rules. "Get to the point and get to it quickly I have a meeting in 5 minutes!". Let us hope that the poets and writers will keep languages rich and diverse! Otherwise, we will all speak the same soon. (I think languages are dying out quicker than most animals. And no one is speaking about it beyond the linguists.)