in CiviCRM 5.15.2 (but also in 5.17.2 alpha on the CiviCRM demo site) the country North Macedonia is still referred to as: Macedonia, Republic of.
Users can not change this themselves obviously. In the documentation it is stated: The installed CiviCRM database contains both an ISO 3166-1-compliant list of countries, and a full, ISO 3166-2-compliant list of provinces (states, departments, voivodships, etc.).
However, this does not seem to be the case.
Can somebody tell me if CiviCRM needs updating the countries (or may be I should add my question somewhere else?)