Currency Selector Format In Mobile

The currency selector on our storefront's desktop version shows the currency selector as follows;

CAD ($)

US ($)

The on mobile devices, it shows as a drop down box and only as;

($)

($)

($)

This has led to confusion on the customer's part as to what currency they're selecting. Where does one edit the text for that drop down list so the 'CAD' and 'US' can be added?

($)