The requested page title contains invalid characters: "$1".

The requested page title contains invalid characters: "$1".

The namespace contains invalid characters.

Specified interwiki prefix "$1" contains invalid characters

Specified interwiki prefix "$1" contains invalid characters

The title supplied contained invalid characters.

The requested page title contains an invalid UTF-8 sequence.

The requested page title contains an invalid UTF-8 sequence.

Error message that the group name contains an invalid character or invalid characters
*$1 is the number of invalid characetares
*$2 are the invalid characters

Error message for the namespace contains invalid characters.

The title you are currently trying to import to contains invalid filename characters.

... (trimmed to 25 characters)

The requested state is invalid.

The requested language is invalid.

The requested page title contains an invalid colon at the beginning.

The requested page title contains an invalid colon at the beginning.

Invalid page title

The group name contains {{PLURAL:$1|an|}} invalid {{PLURAL:$1|character|characters}}: $2

The title is invalid.

The requested page title contains invalid magic tilde sequence (<nowiki>~~~</nowiki>).

The requested page title contains invalid magic tilde sequence (<nowiki>~~~</nowiki>).

The value "$1" contains invalid characters (e.g. $2) for a property name.

Page #$1 templatedata contains invalid data: $2

The target page title is invalid.

The target page title is invalid.