This template is used to add a category to a template that automatically uses the translation project category for a translation project. Note that this template is useless if you do not have translation projects, so any calls in other templates can be replaced with a direct category link.
|1= can be set to the name of the category. It is used directly on main pages, and
/lang is used on translation projects.
|project= has a value, it won't add a category on the translation project pages.