I have a long standing habit of "mispronouncing" words. I like to think of this are creative speaking. Why limit words to be pronounced only one way. Some words have acceptable multiple-pronunciations, so why stop at tomato? At least that's my theory.
And then I also have the habit of adding letter to words I see that totally change their meaning. For example: taking = talking (I've done this one more than once: taking tiger mountain, taking with the left hand) and naive = native (I like the Talking Heads Native Melody better).
Those are just the two most recent examples I can think of. Language gives me a great structure, but I don't limit myself to rules I learned in English class, or Latin or from Strunk and White for that matter. And words only work because we have agreed to agree on the meaning of them.