Transactional email not translated for programmatically created invoice, shipping

Question

Order emails are correct, but my invoice and shipping emails are not fully translated.

Some fields are correct:

• billing/shipping address titles
• payment method title

But some get not translated:

• table headers for ordered items
• grand total / sub total
• payment info text ("Kontodaten" vs "Account info")
• a block from "MageSetup" extension

Differences

• order email uses {{layout handle="sales_email_order_items" order=$order}}
• invoice uses {{layout area="frontend" handle="sales_email_order_invoice_items" invoice=$invoice order=$order}}

I've already checked related files, but couldn't find the reason for missing translations. If I use sales_email_order_items for both it works, but seems not to be correct.

---

Order

Invoice (for the same order)

---

Edit:

Missing translation only appears for programmatically created invoices/shipments.

The code I use is this ...

$invoice->getOrder()->setIsInProcess(true);
$transactionSave = Mage::getModel('core/resource_transaction')
    ->addObject($invoice)
    ->addObject($order)
    ->save();

$emailSentStatus = $invoice->getData('email_sent');
if (!$emailSentStatus) {
    $invoice->sendEmail(true, $customerEmailComments);
    $invoice->setEmailSent(true);
}

But still no idea what wrong here. If I create invoice/shipments from backend translation is OK.

Answer 1

You will need to add the strings in question to app/locale/{whateverlocale}/Mage_Sales.csv

You can locate the strings required in app/design/frontend/{company}/{theme}/template/email/order/items.phtml