Given root page is an invalid title.
MediaWiki:Import-rootpage-invalid/en
Error: the given page title is invalid.
MediaWiki:Wiki-seo-missing-page-title/en
Error: "$1" is an invalid page title.
MediaWiki:Pf formstart badtitle/en
Invalid page title
MediaWiki:Visualeditor-linkinspector-illegal-title/en
Error message when given title is invalid
MediaWiki:Pagecheckout-error-no-title/qqq
An invalid page title was provided
MediaWiki:Flow-special-enableflow-invalid-title/en
The target page title is invalid.
MediaWiki:Review page invalid/en
The target page title is invalid.
MediaWiki:Stabilize page invalid/en
The requested page title is invalid
MediaWiki:Title-invalid/en
The title is invalid.
MediaWiki:Massmessage-content-invalidtitle/en
Invalid 'User' given
MediaWiki:Bs-socialprofile-entity-fatalstatus-save-invaliduser/en
Invalid user given
MediaWiki:Pagecheckout-error-no-user/en
You have chosen an invalid page title.
MediaWiki:Collaborationkit-createhubfeature-invalidtitle/en
# is an invalid character for the title.
MediaWiki:Fanbox-hash/en
Source page is invalid.
MediaWiki:Mergehistory-fail-invalid-source/en
Destination page is invalid.
MediaWiki:Mergehistory-fail-invalid-dest/en
Soorce page is invalid.
MediaWiki:Mergehistory-fail-invalid-source/sco
Destination page is invalid.
MediaWiki:Mergehistory-fail-invalid-dest/sco
Used on [[Special:Import]], when the root page is invalid.
MediaWiki:Import-rootpage-invalid/qqq
Invalid title.
MediaWiki:Growthexperiments-help-panel-questionposter-invalid-title/en
Invalid title
MediaWiki:Ps-createpage-invalidtitle/en
Invalid title
MediaWiki:Pagecheckout-error-no-title/en
Invalid title.
MediaWiki:Visualeditor-title-error/en
Invalid title
MediaWiki:Workflows-activity-error-no-title/en
Invalid title.
MediaWiki:Contributors-badtitle/en