Innit is solid gold to me, makes perfect sense.
As for New Englanders talking funny, you bet we do. And it’s different kinds of funny depending on where you are.
My accent will never go away, I have no control over it. When I meet people for the first time out here many will hear me talk funny and ask, “New York?”
I usually reply, “Boston. If I was from New York I’d be yelling.”