> Its an informal word

Ah, good then, great to see you've changed your mind and now we both agree it is most definitely a word commonly used in English for over a hundred years.

Its incredible the dictionary pronounced it to you instead of showing it to you in a written form. When I go to the link I definitely see it written!

I do agree with you that it is an unprofessional word and probably not the most charitable and professional dictation result. But in the end there's two different directions dictation software can go: what was more accurate to what the person actually said (or what it thinks the person actually said), or the more correct way of saying what was said. If someone was legitimately saying "wanna", should the dictation software always auto-correct it to "want to"? If you were to type "wanna", should the keyboard auto-correct to "want to"?

dude - cool it.