If the LanguageTool add-in icon doesn’t appear in the Home tab after installation, or if it disappears every time you restart Word, this might be due to settings that block web add-ins from starting.
How to fix this
Open Microsoft Word.
Go to File → Options → Trust Center → Trust Center Settings.
Select the Trusted Add-in Catalogs tab.
4. Make sure both checkboxes are unchecked in this section.
5. Click OK to save your settings.
6. Restart Microsoft Word.
After restarting, the LanguageTool add-in should appear in the Home tab.
💡 Note: Depending on your version of Word, the add-in icon might be hidden behind the three dots icon (“...”).