I had the most wonderful english teacher 10th - 12th grade ... She taught us proper english, but she also taught us that wherever we ended up in life, we would pick up certain words, phrases and habits that weren't by the book ... It's okay she said, In your heart you know you've learned it right and thus will apply it so when necessary ... And, you know what? ... She was absolutely right.
I can type up the most professional looking letter with all that proper spelling, grammar, punctuation and diction when it's required.
Other than that I just relax and let it my natural southern english and drawl go wherever it wants to go y'all ... !!!