When creating a Charge with the Ecommerce API, we can provide the receipt_email . There is also a possibility to customize receipt (Edit Receipt Customizations) with a Language option..
We are still in the analysis phase, so we have not played with anything yet, but we can't find any information about Receipt Language and Ecommerce API.
So, my question is.
I can't see any place to provide the language we need to receipt to be sent with the Charge API. It would be a show stopper for us if the invoice is always sent in one and only language. I can't imagine there is no way to manage that.
We are planning to go with iframe and API if that can be of any help providing the right solution for us.