So I'm Canadian, married (not merried or maried) to an Cali boy, traveled extensively and I speak 3 languages. The test says I have no accent. The people I work with would beg to differ.

The funniest stuff is the medical terms. I say cervical sir-vike (like bike)-all, with the emphasis on the vike.
My partner says sir- vick-ull, with the emhasis on the sir. Half the time we can't understand each other. The other thing that's funny is that an ACE bandage in Canada is a tensor bandage. I had a heck of a time trying to get one for one of my clients here. And I say bum to refer to my rear-end, which makes everyone laugh.

Finally, no matter how hard I try, I will never be able to say about like an American.