Hey SERachub,
It looks like you checked out the article on how to change the language on your iPhone. If the issue continues after following the steps in the article, test after restarting your iPhone: Restart your iPhone
Sometimes restarting can clear up unexpected behavior.
"How to restart your iPhone 6, 7, 8, or SE (2nd or 3rd generation)
- Press and hold the side button until the power-off slider appears.
- Drag the slider, then wait 30 seconds for your device to turn off. If your device is frozen or unresponsive, force restart your device.
- To turn your device back on, press and hold the side button until you see the Apple logo."
If the issue persists, reach out to Apple Support directly to help investigate the behavior: Contact - Official Apple Support
Kind regards.