Using BTC to receive currency donations How can Bitcoin be used by a charity in the Congo to receive donations from people around the world paying in different currencies?
You customers can exhange any currency to Bitcoin and pay via Bitcoin with no fees.
So, you need to support traditional payment methods and Bitcoin as well, as a new way of payment over Internet. It's the future of payment. 

Some day, you will kick-off VISA and Paypal from your website ;)