Hi there,
I'm Cherrelyn, I'm here to help and I completely understand how upsetting this is.
Please try these suggestion:
- Go to Settings > Personalization > Fonts, and check if the default system font or Chinese font was replaced.
- You can also try adjusting Display Scaling in Settings > Display, or restore it to 100% if it changed.
- Use System Restore if available to revert to a point before the update.
To report the bug, open the Feedback Hub app, describe the issue, and include screenshots if possible this helps Microsoft prioritize fixes.
Let me know about my suggestion and I'm here to guide you for further assistance.
Warm regards,
Cherrelyn