Thread:Project:Support desk/Difference system messages Nocreatetext, Noarticletext, Noarticletext-nopermission, Newarticle and Newarticletext

Manual:Interface/Noarticletext defines the pages that are shown for non existing pages. But what about MediaWiki:Nocreatetext, MediaWiki:Newarticle and MediaWiki:Newarticletext? Are these messages outdated?