Hi Song Yang,
Thank you for reaching out to Microsoft Q&A forum support.
I understand that when you attempt to open the Word Translation tool, you're encountering the error message shared above., I can relate the inconvenience this may have caused, not to worry, I am here to help.
The tool needs an active internet connection to access Microsoft’s translation services online. If your computer isn’t connected or your network is unstable, Word can't load that feature.
What it suggests
It’s prompting you to:
Check your internet connection (Wi-Fi or Ethernet).
Get back online.
Click “Retry” once you're reconnected, and the feature should work.
If you're online but still getting the error
Try these extra steps:
Restart Word
I hope these suggestions work!
Please feel free to contact us again if you need further assistance.
Thank you for your time.
Best Regards,
Obyziotta / Microsoft Q&A Support Moderator