в переводах нет этого поля. В коде поменял. dummyvalue осталось
private function saveAddress($cart_id_address, $id_country, $id_state, $postcode, $city, $firstname, $lastname, $address1)
{
$dummy = "нет данных";
if ($cart_id_address > 0) { // update existing one
/* @var $tmp_addr AddressCore */
$tmp_addr = new Address($cart_id_address);
$tmp_addr->deleted = 0;
} else { // create a new address
$tmp_addr = new Address();
$tmp_addr->alias = "My Address";
$tmp_addr->lastname = $dummy;
$tmp_addr->firstname = $dummy;
$tmp_addr->address1 = $dummy;
$tmp_addr->postcode = $postcode;
$tmp_addr->city = $dummy;
}