How to generate Multi-Language invoice and email

Question

I have a multi-language store and I need to generate my invoice in 2 different languages in a PDF and the invoice email should also have both the languages. How can I do that.

Answer 1

If you want to have 2 languages in one Invoice PDF, you need to overwrite \Magento\Sales\Model\Order\Pdf\Invoice and \Magento\Sales\Model\Order\Pdf\Items\Invoice\DefaultInvoice and implement your custom rendering with your layout

If you want to customize email you can customize all sales_email_invoice_* templates and customize sales_email_order_invoice_items layout depends on your rules.

Maybe magento 2 how to translate strings to a specific locale will be helpful as well

One of alternative is generate Email/PDF content part for one locale and after for another one and glue parts

Invoice Templates [Added]

Magento uses 4 templates for invoice emails depends on scenario:

• vendor/magento/module-sales/view/frontend/email/invoice_new.html - email about new Invoice for customer
• vendor/magento/module-sales/view/frontend/email/invoice_new_guest.html - email about new Invoice for guest
• vendor/magento/module-sales/view/frontend/email/invoice_update.html - email about update in Invoice for customer
• vendor/magento/module-sales/view/frontend/email/invoice_update_guest.html - email about update in Invoice for guest

If you want to customize it in you theme you should place copy of those files in app/design/frontend/<vendor>/<theme>/Magento_Sales/email/

If you want to customize templates per store you can use Marketing -> Email Templates feature. Create custom template for each store and specify it in Stores -> Configuration for your store scope