If you are willing to rename the word “Pax” then WP Travel plugin provides the feature regarding renaming word “Pax” under Group Size in single itinerary page using filter code as per your requirement.

To rename the word “Pax” you have to add following given code in the functions.php file of your child theme.

function wp_travel_customize_travel_info_section (){
	return __( '%1$d Your text here', 'wp-travel' );
}
	
add_filter('wp_travel_template_group_size_text','wp_travel_customize_travel_info_section');

For detail assistance regarding creating child theme, please refer link.

Before:

After:

Note: You can replace word “Pax” under Group Size with any name as per your requirement.

If you have any queries/confusions then please submit it to our Contact page.