"$1" is not a valid category name.
MediaWiki:Randomincategory-invalidcategory/en
"$1" is not a category.
MediaWiki:Apiwarn-invalidcategory/en
The category name you entered is not valid.
MediaWiki:Apierror-invalidcategory/en
The bot name "$1" is not valid.
MediaWiki:Botpasswords-bad-appid/en
The bot name "$1" is not valid.
MediaWiki:Botpasswords-bad-appid/en-gb
Page name given ($1) is not a valid title
MediaWiki:Tpt-badtitle/en
The specified user name is not valid
MediaWiki:Securepoll-create-invalid-username/en
$1 is not a valid parameter.
MediaWiki:Validator error unknown argument/en
$1 is not a valid page title.
MediaWiki:Srf-rootinvalid/en
"$1" is not a valid storage path.
MediaWiki:Backend-fail-invalidpath/en
$1 is not a valid credential type.
MediaWiki:Changecredentials-invalidsubpage/en
$1 is not a valid credential type.
MediaWiki:Removecredentials-invalidsubpage/en
"$1" is not a valid entity type.
MediaWiki:Wikibase-entitieswithoutlabel-invalid-type/en
"$1" is not a valid language code.
MediaWiki:Wikibase-entitieswithoutlabel-invalid-language/en
$1 is not a valid item ID
MediaWiki:Wikibase-pageswithbadges-invalid-id/en
"$1" is not a valid election ID.
MediaWiki:Securepoll-invalid-election/en
"$1" is not a valid vote ID
MediaWiki:Securepoll-invalid-vote/en
"$1" is not a valid item ID.
MediaWiki:Wikibase-wikibaserepopage-not-itemid/en
"$1" is not a valid data type.
MediaWiki:Wikibase-listproperties-invalid-datatype/en
'''$1''' is not a valid form.
MediaWiki:Sf autoedit invalidform/en
"$1" is not a valid site.
MediaWiki:Massmessage-parse-badurl/en
"$1" is not a valid page title.
MediaWiki:Massmessage-parse-badpage/en
"$1" is not a valid title
MediaWiki:Mediafunctions-invalid-title/en
$1 is not a valid item ID
MediaWiki:Wikibase-entityusage-invalid-id/en
$1 is not a valid entity ID
MediaWiki:Wikibase-entityusage-invalid-id/en
