eh, i think it's just because english has so many dialects, it's effectively a whole lot of really similar languages in a trenchcoat.

My swedish dialect has equally stupid stuff, i could conceivably say "ä i öa i åa?" (literally just a string of vowels) meaning "is it the island in the river?", there's even a comedy song about how wonderfully dumb the dialect can be: (slightly NSFW) https://www.youtube.com/watch?v=CHGuZyUBKSk