Template:Template category/doc

Documentation
Use   at the top of categories containing pages in the template namespace (for example, Category:Autobahn templates).

If the help parameter is not given, the template automatically explains to readers how to add a template to the category. Specify your own help instructions to override the default. You may also set a description of the category:

fr:Modèle:Catégorie de modèles nl:Sjabloon:Catsjab zh:Template:Template category