FOX - Currency Switcher Professional for WooCommerce

The plugin URL: https://wordpress.org/plugins/wc-smart-cod/

• In file functions.php of your current wordpress theme add next code:

  add_filter('wc_smart_cod_fee', function($fee, $settings) {
      if (class_exists('WOOCS') AND $fee) {
          global $WOOCS;
          if ($WOOCS->is_multiple_allowed) {
              $currrent = $WOOCS->current_currency;
              if ($currrent != $WOOCS->default_currency) {
                  $currencies = $WOOCS->get_currencies();
                  $rate = $currencies[$currrent]['rate'];
                  $fee = $fee * $rate;
              }
          }
      }
      return $fee;
  }, 2, 100);