PMPRO change discount code text to promotional code for checkout

change_discount_code_text.php

<?php

// Copy lines 5-25 to your active theme's functions.php or custom plugin.

function change_discount_code_text( $translated_text, $text, $domain ) {
    switch ( $translated_text ) {
        case 'Discount Code' :
            $translated_text = __( 'Promotional Code', 'pmpro' );
            break;

            case 'Click here to change your discount code' :
            $translated_text = __( 'Click here to change your promotional code', 'pmpro' );
            break;

            case 'Do you have a discount code?' :
            $translated_text = __( 'Do you have a Promotional code?', 'pmpro' );
            break;

            case 'Click here to enter your discount code' :
            $translated_text = __( 'Click here to enter your promotional code', 'pmpro' );
            break;
    }
    return $translated_text;
}
add_filter( 'gettext', 'change_discount_code_text', 20, 3 );

?>