This message should have a colon, like other similar messages such as MediaWiki:Log-action-filter-protect/en, MediaWiki:Log-action-filter-block/en, and so on...
I've been told in the past that English messages should not be edited directly on translatewiki. If so, where should it be edited?
Guycn2 · ☎
See the image. The link takes you to phabricator where you can login with your wikipedia account and report the problem.