Because Microsoft shifted away from standalone MSI installers, finding a traditional "office 2021 proofing tools offline installer" executable is no longer possible. Instead, you must utilize the Microsoft Office Deployment Tool (ODT) to download and package these language assets for offline installation.
A .xml file that tells the ODT exactly which proofing languages to download. Step-by-Step Offline Installation Guide office 2021 proofing tools offline installer
The configuration file is a simple XML document that tells the ODT exactly what to download. Below is a standard template for deploying German and Spanish proofing tools for an existing Office 2021 installation: Deploy Office Long Term Service Channel (LTSC) 2021 Add OfficeClientEdition="64" Channel="PerpetualVL2021">
<Configuration> <Add OfficeClientEdition="64" Channel="PerpetualVL2021"> <Product ID="ProofingTools"> <Language ID="en-us" /> <Language ID="fr-fr" /> <Language ID="es-es" /> <!-- Add more language codes as needed --> </Product> </Add> </Configuration> Language ID="en-us" />