Board Thread:Support Requests - Community Management/@comment-32507250-20161102185335/@comment-168424-20161102210518

Yes, you would edit MediaWiki:Licenses. You can use the CC one as an example. The second level items like  are the actual selectable license entries.

The template name, i.e. Template:Self, comes first, a vertical bar separator, and then the label for the menu item.