Hi Cecilia508,
For help with dictation and your iPhone keyboard, test the steps below found in the guide here: Add or change keyboards on iPhone - Apple Support
"Add or remove a keyboard for another language
- Go to Settings
> General > Keyboard. - Tap Keyboards, then do any of the following:
- Add a keyboard: Tap Add New Keyboard, then choose a keyboard from the list. Repeat to add more keyboards.
- Remove a keyboard: Tap Edit, tap
next to the keyboard you want to remove, tap Delete, then tap Done. - Reorder your keyboard list: Tap Edit, drag
next to a keyboard to a new place in the list, then tap Done.
If you add a keyboard for a different language, the corresponding language is automatically added to the Preferred Language Order list. You can view this list and add languages directly to it in Settings > General > Language & Region. You can also reorder the list to change how apps and websites display text."
Should the issue continue after checking your settings are correct, reach out to Apple Support directly to further assist.
Contact - Official Apple Support
Contact Apple for support and service - Apple Support
Best.