About [[MediaWiki:Grouppage-oversight/en]], [[MediaWiki:Group-oversight-member/en]] and [[MediaWiki:Group-oversight/en]]
About MediaWiki:Grouppage-oversight/en, MediaWiki:Group-oversight-member/en and MediaWiki:Group-oversight/en
These are non-translatable messages (they were in the past) which are being used on some Wikipedias. In fact, the "oversight" group is still in use as you can see on w:en:Special:ListGroupRights. Fix needed?