Change Load Coupon Labels

/**
 * Change Load Coupon Labels
 * Changes the coupon labels for the mycred_load_coupon shortcode
 * without the need to translate the plugin. Replace "MY WORD" with your string.
 * @version 1.0
 */
add_filter( 'mycred_load_coupon', 'mycred_pro_adjust_coupon_form' );
function mycred_pro_adjust_coupon_form( $output ) {

    // Replace "Coupon" title
    $output = str_replace( '<label for="mycred-coupon-code">' . __( 'Coupon', 'mycred' ) . '</label>', '<label for="mycred-coupon-code">MY WORD</label>', $output );

    // Replace button label
    $output = str_replace( 'button-primary" value="' . __( 'Apply Coupon', 'mycred' ) . '"', 'button-primary" value="MY WORD"', $output );

    return $output;

}