Invalid username "$1".
MediaWiki:Changeauthor-invalid-username/en
Invalid username "$1".
MediaWiki:Apierror-invaliduser/en
Invalid username
MediaWiki:Sudo-error-sudo-invaliduser/en
Invalid username
MediaWiki:Maintenance-deleteBatch-error-invalid/en
Invalid username!
MediaWiki:Maintenance-invalidname/en
Invalid username
MediaWiki:Special-shareachievement-invalid-username/en
Invalid username
MediaWiki:Bs-privacy-anonymization-api-invalid-username/en
Invalid new username.
MediaWiki:Usermerge-badnewuser/en
The username "$1" is invalid.
MediaWiki:Reassignedits-error-invalid/en
The username is invalid.
MediaWiki:Bs-usermanager-invalid-uname/en
The specified username ($1) is invalid
MediaWiki:Rest-invalid-user/en
The username "<nowiki>$1</nowiki>" is invalid.
MediaWiki:Renameusererrorinvalid/en
Invalid username or IP address provided
MediaWiki:Guc-invalid-username/en
Invalid username: "$3" (user ID $2)
MediaWiki:Maintenance-checkUsernames-error-notvalid/en
Username you entered is invalid. Please pick a different username.
MediaWiki:Bs-privacy-anonymization-invalid-name/en
The provided username is an invalid type.
MediaWiki:Antispoof-badtype/en
Username: $1
MediaWiki:Bs-privacy-transparency-private-username/en
Invalid repo "$1".
MediaWiki:Apierror-invalidrepo/en
Invalid ID: $1.
MediaWiki:Wikibase-entitydata-bad-id/en
Invalid ID: $1.
MediaWiki:Wikibase-entitypage-bad-id/en
Invalid namespace: $1
MediaWiki:Bs-parser-error-invalid-namespace/en
Invalid title: $1
MediaWiki:Bs-parser-error-invalid-title/en
Invalid state "$1".
MediaWiki:Centralauth-centralautologin-badstate/en
Invalid page: $1
MediaWiki:Logentry-invalidpage/en
Invalid title "$1"!
MediaWiki:Maintenance-invalidtitle/en