Events Calendar 3.8 // Translate Additional Fields header to something else

gistfile1.txt

add_filter('gettext', 'theme_filter_text', 10, 3);

function theme_filter_text( $translations, $text, $domain ) {
    // If this text domain starts with "tribe-"
    if(strpos($domain, 'tribe-') === 0) {
            // The text to replace
            $text = str_replace(
                    // Text to search for
                    array('Other'),

                    // Text to replace it with -- change this for your needs
                    array('Something Else'),
                    $text
            );

    }

	return $text;
}