Renaming WooCommerce Order Status

Question

I would like to rename the WooCommerce order status from "Completed" to "Order Received". I can edit the script below located in wc-order-functions.php, but I would prefer not to modify any core files or use a plugin.

Is it possible to override woocoomerce functions with scripts in child theme's functions.php file?

function wc_get_order_statuses() {
  $order_statuses = array(
    'wc-pending'    => _x( 'Pending Payment', 'Order status', 'woocommerce' ),
    'wc-processing' => _x( 'Processing', 'Order status', 'woocommerce' ),
    'wc-on-hold'    => _x( 'On Hold', 'Order status', 'woocommerce' ),
    'wc-completed'  => _x( 'Completed', 'Order status', 'woocommerce' ),
    'wc-cancelled'  => _x( 'Cancelled', 'Order status', 'woocommerce' ),
    'wc-refunded'   => _x( 'Refunded', 'Order status', 'woocommerce' ),
    'wc-failed'     => _x( 'Failed', 'Order status', 'woocommerce' ),
  );
  return apply_filters( 'wc_order_statuses', $order_statuses );
}

Answer 1

Just renaming order status "Completed" to "Order Received", it's easy and can be accomplished this way with wc_order_statuses hook (you will paste this snippet in your active child theme function.php file):

add_filter( 'wc_order_statuses', 'wc_renaming_order_status' );
function wc_renaming_order_status( $order_statuses ) {
    foreach ( $order_statuses as $key => $status ) {
        if ( 'wc-completed' === $key ) 
            $order_statuses['wc-completed'] = _x( 'Order Received', 'Order status', 'woocommerce' );
    }
    return $order_statuses;
}

Code goes in function.php file of your active child theme (or active theme). Tested and Works.

Update 2018 - To rename, in Order list page:
• the bulk actions dropdown
• the order status tabs (with the count)
See: Rename multiple order statuses in Woocommerce

Other related reference: How to create a custom order status in woocommerce