Magento – Magento PDF invoice translations

Magento have multiple translation scopes: Global, admin, theme & module. Depending on which block type (model) each template is defined by, the scope differs.

I'll would try adding your translation strings to your theme at: /app/design/frontend/yourpackage/yourtheme/locale/en_US/translate.csv

But it's better to know your scope, check which module/class $this is an instance of in each template, if it's not already defined in the template top comment block. Then you can add the translation strings to each modules own translation files or create them if they does not already exist.

Take a look @

• Customize Magento PDF Invoice and Packingslip
• Edit an invoice PDF

You will need to rewrite order_pdf_invoice (or copying it to app/local/Mage)

<models>
    <sales>
        <rewrite>                    
            <order_pdf_invoice>Atwix_Printedorders_Model_Invoice</order_pdf_invoice>
        </rewrite>
    </sales>
...
</models>