I live in a southern hick town, so I have an obligation to say every word wrong. I say okry, envelep, coke intead of soda, tater tots, ain't, gonna, tons of contractions that don't exist, and tons of stuff I say wrong that I don't realize. You can just get over it. Don't you have anything else to worry about?
Oh yea, it's pronounced nitch. Why? Because I said so.