It's not possible to change the currency of your loan. Your loan is essentially an asset that is denominated in a specific currency. The investors who helped to fund your education have invested in the same currency.
Our alumni live all over the world and it's very common for them to earn in a currency that's different to the currency of the loan. For more details on how loan payments work across currencies, please have a look at the section on Where should I make a payment?.
Because of the enormous complexity around live exchange rates (not to mention regulatory environments), we'll only send your monthly repayment or settlement amount in the currency of your loan. You'll be responsible for managing the currency exchange and any calculations related to a currency other than the currency of your loan.