Text displayed in the 3D view cannot be translated.

This is a UI created by that addon itself,

so it is outside the scope of Blender's standard translation feature.

The User Translate addon can only translate text in Blender's standard UI.

Competes with BLT

This information is for Chinese users.
Users have reported that the User Translate add-on does not work when using BLT.exe, which translates text in the built-in interface, in Blender 4.0.
Please note that there is a trade-off between BLT and this add-on.

However, it seems that both can be used together for Blender 3.6 or earlier.

Tutorial video for version 1.0.22 or earlier