whether is mispelled wether several places in the Moodle codebase.

Recommend fixing it in the public facing messages:

mod/scorm/lang/en/scorm.php:$string['nav_help'] = 'This setting specifies wether to show or hide the navigation buttons and their position.
mod/scorm/lang/en/scorm.php:$string['navdesc'] = 'This setting specifies wether to show/hide navigation buttons and their position.';