It's up to us Californians to protect the English language since we seem to be the only ones who cans speak it without an accent.
My dad is from Washington state and he always says warsh. It used to drive me nuts as a kid. The odd thing is, his parents didn't say it that way, but my mom's mom said warsh and my mom says wash. I was thinking it was a Washington thing but I guess not. Don't know where it came from.
We can also bring out the soda or pop question (soda is the correct answer, of course)
And then if we want to split the state of California, SoCals always put a "THE" in front of their freeways. If you ask them how to get somewhere they will say, "You take the 5 to the 10 and over to the 30..." Up here we say "You take 101 to 580..." Oh yeah, and their restaurants always have "Frisco Burgers" but up here no one calls San Fransisco "Frisco".
I actually find it very interesting that different areas of the same country pronounce things so differently and use different words. Fascinating subject to me.