"$1" is not a creatable page title
MediaWiki:Htmlform-title-not-creatable/en
"$1" is not a valid page title.
MediaWiki:Massmessage-parse-badpage/en
$1 is not a valid page title.
MediaWiki:Srf-tree-rootinvalid/en
"$1" is not a valid title
MediaWiki:Workflows-property-validator-valid-title-error/en
"$1" is not a valid title.
MediaWiki:Apiwarn-invalidtitle/en
"$1" is not a valid title
MediaWiki:Mediafunctions-invalid-title/en
Page name given ($1) is not a valid title
MediaWiki:Tpt-badtitle/en
Title "$1" is not a valid map data page
MediaWiki:Kartographer-error-title/en
Error: "$1" is not a correct title.
MediaWiki:Createredirect-invalid-title/en
Could not get page title
MediaWiki:Coll-notitle title/en
The given target is not a valid page title
MediaWiki:Bs-smartlist-invalid-target/en
The requested redirect is not a valid page title. Please enter a different title.
MediaWiki:Redirectmanager-redirect-page-invalid/en
The target translatable page name is not a valid title.
MediaWiki:Pt-movepage-block-base-invalid/en
Page title could not be retrieved
MediaWiki:Thanks-error-notitle/en
Page "$1" is not a local page.
MediaWiki:Lingo-terminologypagenotlocal/en
Provided title not valid
MediaWiki:Bs-distributionconnector-checkpermissions-error-invalid-title/en
Page "$1" is not a translation
MediaWiki:Mlm-error-title-isnottranslation/en
$1 is not a LiquidThreads page
MediaWiki:Lqt-not-a-liquidthreads-page/en
The page title "$1" could not be parsed.
MediaWiki:Extralanguagelink-badtitle/en
The provided title '$1' is not valid for a ZObject.
MediaWiki:Wikilambda-invalidzobjecttitle/en
The requested target of this redirect ('$1') is not a valid page title.
MediaWiki:Redirectmanager-invalid-target/en
Title specified ("$1") does not exist!
MediaWiki:Maintenance-titlenoexist/en
Page is not a valid category: $1
MediaWiki:Bs-parser-error-invalid-category-title/en
[[$1]] is not a Collaboration List page
MediaWiki:Collaborationkit-list-notlist/en
Page is not watchable.
MediaWiki:Watchlistnotwatchable/en