$string['invalidsesskey'] = 'Incorrect sesskey submitted, form not accepted!';
$string['invalidsection'] = 'Course module record contains invalid section';
$string['invalidshortname'] = 'That\'s an invalid short course name';
+$string['invalidtexcommand'] = 'Forbidden TeX command ($a)';
$string['invalidurl'] = 'Invalid URL';
$string['invaliduser'] = 'Invalid user';
$string['invaliduserid'] = 'Invalid user id';