Observed
When I use an unknown parameter in a message, save it, and refresh Special:Translate[1], the message is marked as outdated. When I open the editor, I see the warning "This translation may need to be updated."
I would expect to see "Following parameter is unknown: $1" instead[2]
[1] https://translatewiki.net/w/i.php?title=Special:Translate&group=mediawiki&language=nl&filter=!translated&action=translate&uselang=en
[2] https://translatewiki.net/w/i.php?title=MediaWiki:Createacct-benefit-body2/nl&action=edit&uselang=en
See attached screenshots of editor for [1] and editor for [2].
Version: master
Severity: normal
Attached: