Thread:Support/Error message, but why?

I understand on a technical level why there is an error message at: http://translatewiki.net/w/i.php?title=MediaWiki:Globalfileusage-desc/ksh&action=edit&loadgroup=core&loadtask=untranslated but imho, there is no semantic reason as any link anchor text should work, even if it is taken from another message. Background here is that a transition from "Spezial" to "Extra" is considered but not yet certain, and this makes it smoother to switch over.