Template:Language

From korrekt.org

A template for specifying the language of some article. First parameter is a language code, the second (optional) is a master page that is the first language version of that page. The idea is that one or more alternative language pages refer to one such master to indicate their main subject.

As this is a privately edited wiki with no effort to make pages maintainable for other editors, these settings are just hidden. The language connections are evaluated when building the sidebar of actions, so the information appears there.