even within English we have a ton of local and regional variances in everything from accent to connotation to words to the point that some variants aren't even intelligible. Check out the Ocracoke Brogue: https://www.youtube.com/watch?v=csfyrRqc5TU and that's right in the heart of North America!

i'm no linguist but my familiarity with german/chinese and a smattering of other languages has led me to conclude that humans have an inbuilt tendency to just mess things up just because. If there's a grammar rule that can be broken or inverted, some language out there will do it. the tower of babel is encoded in our DNA. The Diryabal language even has a gender for vegetables and fruits. (http://www.superlinguo.com/post/5746695497/lady-nouns-and-ve... and https://en.wikipedia.org/wiki/Dyirbal_language)