$string['failgradeenabled_help'] = 'If enabled, a student must not have a psssing grade to attempt the quiz more times.';
$string['failgradedescription'] = 'Attempts avaliables till reaching passing grade.';
should be more like:
$string['failgradeenabled_help'] = 'If enabled, a student must not have a passing grade to attempt the quiz more times.';
$string['failgradedescription'] = 'Attempts available untill reaching passing grade.';
$string['failgradeenabled_help'] = 'If enabled, a student must not have a psssing grade to attempt the quiz more times.'; $string['failgradedescription'] = 'Attempts avaliables till reaching passing grade.';
should be more like: $string['failgradeenabled_help'] = 'If enabled, a student must not have a passing grade to attempt the quiz more times.'; $string['failgradedescription'] = 'Attempts available untill reaching passing grade.';