

Simple answer without typing a textbook is simply that the longer a language exists, the more individual “quirks” it picks up.
Words or idioms from a different language, regional differences in pronunciation that become common, changes in preferred spelling, etc…
Language is protean and ever evolving, which means that no (natural) language is ever going to be without it’s own unique weirdness.









Just imagine these two guys were just sitting in a waiting room for something completely different and are now associated with super-gonorrhoea because some asshat snapped their photo for a stock image website…