Download the edition that matches your version of Office. For example, if you're running 32-bit Office Professional Plus 2016 on 64-bit Windows, download the 32-bit edition of the language pack, language interface pack, or proofing tools package. If you're running 64-bit Office Professional Plus 2016 on 64-bit Windows, download the 64-bit edition of the language pack, language interface pack, or proofing tools package.