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 mondree/components/templates/shortcodes/efcb_fullschedule.php and paste this in to the child theme.
ie
mondree-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.php from the child theme and search for the following (apx line no 28) :
<?php _e(‘Track’, ‘mondree’); ?>
4) Replace Track with new text
<?php _e(”Your text”, ‘mondree’); ?>
5) Update the file.