ready2order / r2o-api-client-php Goto Github PK

We´re having an issue with cancelled invoices. The language setting in our account usually is German however when we cancel invoices the language switches to English. How can I set the language in the cancelled invoice to German?

Here is my example code:

 r2o_api->post(
	"document/invoice/{$r2o_id}/delete",
	array(
	  "id" => $r2o_id,
	  "storno_id" => $storno_id,
	  "storno_reason" => "Korrektur",
	  "invoice_externalReferenceNumber" => $invoice_nr
	)
  );