Case: editors append the {{#translation:}} suffix to various page links. Now certain languages show the links as red and if you click on them, there is no indication on how to start the translating process. Just the usual "There is currently no text in this page."
The option $wgTranslatePageTranslationULS exists https://www.mediawiki.org/wiki/Help:Extension:Translate/Configuration#Page_translation_feature
It would be nice to have a similar option for redirecting on red link click.