There's a dispersed section of English who substitute 'g' with 'k' on certain words, such as 'somethink, 'nothink' and 'anythink' I met someone called
Kevin who did this - nice chap otherwise....
Then, of course there's the way we can totally demolish the pronunciation of some words, especially the names of places and peoples' names:
Chalmondley - is pronounced Chummley
Beauchamp Place is pronounced Beecham Place
Beauvoir is pronounced Beaver (reminds me of a joke - maybe not now, though)
I'm sure there's more....