Office 2021 Proofing Tools Offline Installer -

The proofing tools for Office 2021 include language-specific dictionaries, thesauruses, and grammar checkers. These tools can be installed separately from the main Office installation.

setup.exe /configure proofingtools.xml Assuming you've downloaded the ODT and extracted it to a folder, create a proofingtools.xml file with the following content:

Please note that the above method requires some technical expertise and might not be suitable for all users.

However, I can suggest an alternative: