If you have an MSI-based, volume-licensed copy of Office 2016, you must get the language pack through specific channels. There is for these files.
To determine if you need the 64-bit language pack:
Q: Can I install the Microsoft Office 2016 English language pack on a Mac? A: No, the language pack is only available for Windows systems.
Open any Microsoft Office 2016 application (such as Word or Excel). Click on the tab in the top-left corner.
[Open Word] ➔ [File] ➔ [Options] ➔ [Language] ➔ [Set as Preferred] ➔ [Restart Office] Setting the Display and Help Language Open Microsoft Word 2016.
Even with the correct files, you might encounter issues. Here are the most common problems and how to fix them.
Changes the user interface text, including menus, ribbon tabs, buttons, dialog boxes, and help documentation, into English.