Has this idea ever come into your mind or am I just crazy?

I’m not talking about a Yorkshire accent. I’m talking about dialect words like “gennel”, “buffet” and phrases like “frame thisen” and “ah’ll si thi”.

Ayup. Gie-ooer rooarin’, tha mardy bugger! Sup thi tea an ah’ll tek thi on’t Moor.

That’s Yorkshire dialect (Sheffield). Tell me what all of that means (without Googling any of it) and I’ll grant you that broad Yorkshire is intelligible by a person who speaks standard English. English people, raised on TV shows where they have made fun of the Yorkshire dialect might have a clue as to what it means, but I doubt your average American or Australian would have a clue what any of that means.