Your customers want to see the invoices in their own language, but you need it in some other language for legal reasons?

Install this extension and you'll get invoices and creditmemos in two languages (when printed from the admin backend).

To install this extension, you should use modman:

modman clone https://github.com/quafzi/Magento-MultilangPdfs.git

At the moment, there is no configuration in Magento Backend. Invoices and Creditmemos will be printed in english, additionally.

If you need to change this language, please change en_US to your required locale in app/code/community/Quafzi/MultilangPdfs/etc/config.xml.