What languages does the electronic payment program Payson.se work in?
Payson:  As of 2013.07.03 their website offers Swedish and Finnish language pages only. Payment service provider: A payment service provider (PSP) offers shops online services for accepting electronic payments by a variety of payment methods including credit card, bank-based payments such as direct debit, bank transfer, and real-time bank transfer based on online banking.
Swedish and Finnish