JezK

Edit File: DataCountries.php

<?php
/**
 * REST API Data countries controller.
 *
 * Handles requests to the /data/countries endpoint.
 */

namespace Automattic\WooCommerce\Admin\API;

defined( 'ABSPATH' ) || exit;

/**
 * REST API Data countries controller class.
 *
 * @internal
 * @extends WC_REST_Data_Countries_Controller
 */
class DataCountries extends \WC_REST_Data_Countries_Controller {

/**
	 * Endpoint namespace.
	 *
	 * @var string
	 */
	protected $namespace = 'wc-analytics';

/**
	 * Register routes.
	 *
	 * @since 3.5.0
	 */
	public function register_routes() {
		register_rest_route(
			$this->namespace,
			'/' . $this->rest_base . '/locales',
			array(
				array(
					'methods'             => \WP_REST_Server::READABLE,
					'callback'            => array( $this, 'get_locales' ),
					'permission_callback' => array( $this, 'get_items_permissions_check' ),
				),
				'schema' => array( $this, 'get_public_item_schema' ),
			)
		);

parent::register_routes();
	}

/**
	 * Get country fields.
	 *
	 * @return array
	 */
	public function get_locales() {
		$locales = WC()->countries->get_country_locale();
		return rest_ensure_response( $locales );
	}
}