Reseller Hosting allows you to select a language for new packages. Later, after applying a particular package to users, they will see in their cPanel the language that was set for them when the package was created.

The first thing that needs to be done is to ‘Add a Package’ in WHM:

Secondly, you need to specify the values of your package, and you can pick the language of the package from the ‘Locale‘ drop-down menu:

If you, as a Reseller, want to see a different language in your cPanel account, you will need to create and apply a new package:

Note: The language on the WHM platform is not changeable.