2016 English Language Pack 64-bit: Microsoft Office

You are trying to install the 64-bit pack on a 32-bit Office, or vice versa. Solution: Uninstall the incorrect language pack and download the version that matches your Office architecture. Check your Office version using the method in Part 1.2.

You must have a base version of Office 2016 (such as Home & Business, Professional, or Standard) already installed. microsoft office 2016 english language pack 64-bit