You downloaded the 64-bit language pack but your underlying Office 2016 is actually the 32-bit variant.

The installation did not complete successfully or the installer was corrupted.

A Language Accessory Pack (LAP) adds specific language-based features to your existing Office installation. For Office 2016, these packs typically include:

Windows and Office can run on different bit versions. You must match the "bitness" of your Office installation, not just your Windows Operating System. Open any Office 2016 application (e.g., ).

Go to File > Options > Language . Check if "Proofing available" or "Proofing installed" is listed next to English. If it shows a link to download, click it to fetch the missing dictionary components.

Scroll down to the language selection dropdown and choose .

Switches menus, ribbons, dialog boxes, and button labels into English.

If you are running a 64-bit architecture and require English functionality, installing the is the most efficient solution.

Language packs are version-specific. A Language Pack built for Office 2019 or Microsoft 365 will not work on Office 2016. 2. Confirm Your Architecture (Must be 64-Bit)