How to use locolized shipping addresses in pdf invoice

-- url of the page with the problem -- : www.autovakshop.nl

I am using the attach pdf invoice plugin. It works good, only for the shipping address is see Mr instead of Dhr. In the billing addres it is correct.

To make the shipping and billing addres I am usign the following code in invoice.php:

$shipping_address = sprintf("%s<br/>%s %s %s<br/>%s %s<br/>%s %s<br/>%s",
$order->shipping_address->address_company,
$order->shipping_address->address_title,
$order->shipping_address->address_firstname,
$order->shipping_address->address_lastname,
$order->shipping_address->address_street,
$order->shipping_address->address_streetnumber,
$order->shipping_address->address_post_code,
$order->shipping_address->address_city,
$order->shipping_address->address_country_name_english,

);

$invoice_address = $addressClass->displayAddress($order->fields, $order->$oneAddress, $view);


What am I doing wrong?