Before you begin, ensure you know whether your Office 2016 is the 32-bit (x86) or 64-bit (x64) version. You can check this by opening Word, going to File > Account > About Word.
If the language does not appear after installation, try the following:
When searching for "repacks," it is vital to exercise caution. Because these are modified by third parties rather than Microsoft directly, you should only download from trusted community forums or verified software mirrors.
Repair Office: If the repack causes errors, go to Control Panel > Programs and Features, right-click Microsoft Office 2016, and select "Change" followed by "Quick Repair."