"$1" is not a category.
MediaWiki:Apiwarn-invalidcategory/en
Page is not a valid category: $1
MediaWiki:Bs-parser-error-invalid-category-title/en
Category $1 does not exist or is empty
MediaWiki:Randomincategory-nocategory/en
"$1" is not a number.
MediaWiki:Smw nofloat/en
"$1" is not a file.
MediaWiki:Apiwarn-notfile/en
Category not found
MediaWiki:Wikiforum-cat-not-found/en
The category name you entered is not valid.
MediaWiki:Apierror-invalidcategory/en
"$1" is not recognized as valid category or value annotation.
MediaWiki:Smw-category-invalid-value-assignment/en
$1 is not a LiquidThreads page
MediaWiki:Lqt-not-a-liquidthreads-page/en
"$1" is not a valid title
MediaWiki:Mediafunctions-invalid-title/en
Page "$1" is not a translation
MediaWiki:Mlm-error-title-isnottranslation/en
'''$1''' is not a valid form.
MediaWiki:Pf autoedit invalidform/en
Error! $1 is not a number.
MediaWiki:Admanager zonenotnumber/en
"$1" is not a translatable message
MediaWiki:Translate-translations-no-message/en
"$1" is not a valid site.
MediaWiki:Massmessage-parse-badurl/en
'$1' is not a recognized project.
MediaWiki:Readinglists-db-error-no-such-project/en
$1 is not a valid parameter.
MediaWiki:Validator error unknown argument/en
"$1" is not a valid title.
MediaWiki:Apiwarn-invalidtitle/en
"$1" is not a valid title
MediaWiki:Workflows-property-validator-valid-title-error/en
$1 is not a directory or is missing.
MediaWiki:Externaldata-not-a-directory/en
Category <i>$1</i> not found
MediaWiki:Categorytree-not-found/en
This is the $1 category.
MediaWiki:Pf category desc/en
Category does not exist.
MediaWiki:Wikiforum-cat-not-found-text/en
[[$1]] is not a Collaboration List page
MediaWiki:Collaborationkit-list-notlist/en
Page "$1" is not a local page.
MediaWiki:Lingo-terminologypagenotlocal/en