How can I make my iPhone stop using the words gonna and wanna when I am dictating?

This probably won't help, but when I run a test here using the same words, "going to" and "want to" and pronounce them slowly and distinctly, the words are displayed as "going to" and 'want to".

If I speak more quickly and don't really try to pronounce each syllable clearly, I get "gonna" and "wanna" every time.

Are you saying each as 2 words: “Going to” and “want to”?

Just dictated:

”I’m going to go to the store”