Can't do it through custom fields, because it has to do with how the code displays "zones". I can change the zones and the custom fields, but none of that fixes the code for displaying the zones on the registration page dropdowns.
The custom field is "address_country". On the registration page "address_country" calls upon Zone "Countries". The dropdown showing "Zone - Countries" displays the zone's "Name in English" followed by "Name." For example, Sweden shows up in the dropdown as Sweden (Sverige). I don't want to display the "(Sverige)".