Only show currency on Product pages

Hello,

on our website we are using WPML and your plugin. Due to limitations from our payment gateway we can only allow checkout in our local currency ZAR. This is not a problem. The problem is that when the user gets the order confirmation the price is then shown in USD. I want that all Woo emails have the price in my local currency ZAR. Because on the product page we tell the client that the price in USD is only an indication.