add_filter( 'wc_order_statuses', function( $order_statuses ) {
foreach( $order_statuses as $key => $status ) {
$order_statuses['wc-completed'] = __( 'Paid (Completed)', 'woocommerce' );
$order_statuses['wc-pending'] = __( 'Balance Due (Pending)', 'woocommerce' );
}
return $order_statuses;
} );
Relates to: Custom order status