If you want to spell check documents, write emails, and use grammar tools in within Microsoft Office 2016, you need to install the specific Proofing Tools package. This allows you to switch the editing language without changing the entire interface of the software.

If you’ve installed Microsoft Office 2016 but find that your spell check, grammar check, and thesaurus are missing for Portuguese (Portugal), you likely need to install the specific pack.

: Obtain the correct version (32-bit/x86 or 64-bit/x64) from the Microsoft Download Center Architecture Match