Thread:Project:Support desk/MediaWiki:Noarticletext page not shown

I have two MediaWiki wiki's and with both I've implemented a MediaWiki:Noarticletext system message, both with same text.

One wiki shows the text of that system message for a not existing page (as logged in user), the other shows ''There is currently no text in this page (for a not existing page, as logged in user). You can search for this page title in other pages, search the related logs, or edit this page''.

What's the difference? What am I doing wrong? Local settings?