In Event Setup - Countries you now have the possibility to adapt the country names.
The changes are for all events and memberships in a company. Please adapt the values not in between events. As the changes also have influence on e.g namebadges or exports, etc.

Also you can translate them to all languages m-anage offers:

In the Registration - Helpdesk the shown country name is taken from the main event language

The changed country names are shown in every country dropdown list, exports, name badges, invoices etc.