If you are an IT administrator or looking to automate the installation (similar to a "repack"), you can use the Office Deployment Tool (ODT) Custom XML

After the "repack" or pack is installed, you must activate the language within the Office applications: Open any Office program (e.g., Word). Navigate to File > Options > Language Choose Display and Help Languages , select your desired language and click Set as Preferred (or Set as Default). all Office programs for the changes to take effect. Microsoft Support 4. Key Differences: Packs vs. LIPs Customize language setup and settings for Office 2016

This downloads the official bits from Microsoft—no repack required.

For users looking to manage language settings in Office 2016, a "repack" generally refers to a pre-configured or bundled installer that simplifies the addition of language support. The process differs significantly depending on whether you are using a standard retail/C2R version or a Volume Licensed (MSI) version. 1. Identify Your Office 2016 Version