Yes, It’s possible. For that you need to do the following:
1) Please don’t forget to take a backup of the file prior to any change.
2) Copy khore/components/templates/shortcodes/efcb_fullschedule.php and paste this in to the child theme.
ie
khore-child/components/templates/shortcodes/efcb_fullschedule.php
You need to keep the same folder structure as above by creating components, templates and shortcodes folder.
3) Open efcb_fullschedule.ph from the child theme and search for the following (apx line no 30) :
_e(‘Track’, ‘khore’)
4) Replace Track with Session
ie _e(”Your text’, ‘khore’)
5) Update the file.