Have a look here, there is a token you can use to display currency in the locale of the user:
formatDecimal(1234.56, '¤ #,##0.00')
Have a look at the Decimal Tools module in the Marketplace.
It has a more fully featured version of the formatDecimal command that lets you specify the separator so you don’t have to use what is specified for your locale like the built-in version of the command.
Hope this helps.