Hello MDATX,
Welcome to Apple Support Communities.
From reading your post, it appears when using speech dictation, the translating is not reading your voice correctly. We're here to help you take a look into that!
First, reset up the Siri voice recognition and check to make sure all the microphone are working properly. Here are a couple articles to follow with steps to help resolve this issue:
If Siri or "Hey Siri" isn't working
If the microphones on your iPhone aren't working
If the issue is with a certain app, follow these steps in attempting to resolve the issue:
If an app unexpectedly quits, stops responding, or won’t open
Hopefully this helps!