SUMMARY
The country list, which uses (according to Laurent Montel) the official iso3166-1 country list, contains wrong spelled countries, missing countries, entries not being a country, wrong linkages to the German language version, and behavioral issues.
This bug report refers to the ISO 3166-1 country list (https://en.wikipedia.org/wiki/ISO_3166-1, 2026-02-16)

STEPS TO REPRODUCE
1. Open KAddressBook
2. Go to settings of a contact
3. Go to address settings
4. Open country list

OBSERVED RESULT

Missing countries:
- Antarctica
- Bouvet Island
- French Southern Territories
- Heard Island and McDonald Islands
- South Georgia and the South Sandwich Islands

Not a Country:
- Canary Islands
- Ceuta And Mellila
- Default
- Diego Garcia
- Europe
- Kosovo
- Latin America
- World

Wrong spelling:
- Bolivia -> Bolivia, Plurinational State of
- Bonaire -> Bonaire, Sint Eustatius and Saba
- Bosnia And Herzegowina -> Bosnia and Herzegovina
- Brunei -> Brunei Darussalam
- Cape Verde -> Cabo Verde
- Cocos Islands -> Cocos (Keeling) Islands
- Congo Brazzaville -> Congo
- Congo Kinshasa -> Congo, Democratic Republic of the
- Cura Sao -> Curaçao
- Ivory Coast -> Côte d'Ivoire
- Czech Republic -> Czechia
- East Timor -> Timor-Leste
- Guinea Bissau -> Guinea-Bissau
- Iran -> Iran, Islamic Republic of
- Laos -> Lao People's Democratic Republic
- Macedonia -> North Macedonia
- Micronesia -> Micronesia, Federated States of
- Moldova -> Moldova, Republic of
- Netherlands -> Netherlands, Kingdom of the
- North Korea -> Korea, Democratic People's Republic of
- Palestinian Territories -> Palestine, State of
- Reunion -> Réunion
- Russia -> Russian Federation
- Saint Barthelemy -> Saint Barthélemy
- Saint Helena -> Saint Helena, Ascension and Tristan da Cunha
- South Korea -> Korea, Republic of
- Svalbard And Jan Mayen Islands -> Svalbard and Jan Mayen
- Swaziland -> Eswatini
- Syria -> Syrian Arab Republic
- Tanzania -> Tanzania, United Republic of
- Turkey -> Türkiye
- United Kingdom -> United Kingdom of Great Britain and Northern Ireland
- United States -> United States of America
- Venezuela -> Venezuela, Bolivarian Republic of
- Wallis And Futuna Islands -> Wallis and Futuna

Wrong linkage in the German language version:
- Bosnia And Herzegowina -> Deutschland
- British Virgin Islands -> Deutschland
- Cape Verde -> Deutschland
- Cocos Islands -> Deutschland
- Congo Kinshasa -> Deutschland
- Czech Republic -> Deutschland
- East Timor -> Deutschland
- North Korea -> Deutschland
- South Korea -> Deutschland
- Palestinian Territories -> Deutschland
- Saint Martin -> Deutschland
- Sint Maarten -> Deutschland
- Turkey -> Italien
- United States Virgin Islands -> Vereinigte Staaten

Misc behavioral issues:
1. The least saved country to a e. g. private address is, when opening the contact settings / country list again, twice in the country list. The first entry is somewhere in the list and the second entry is in the correct alphabetical order.

2. After some time (unfortunately I cannot specify further) and several changes of the addresses country of one contact the original entry of a contacts private address disappears from the country list, in my case "Germany". Even after closing and restarting KAddressBook it is gone.

EXPECTED RESULT

See above.

Misc behavioral issues:
1. The actual saved country of one contact should not appear twice in the country list when entering the setting of the address.

2. No country should disappear from the country list.


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Kubuntu 24.04
KDE Plasma Version: 5.27.12
KDE Frameworks Version: 5.115.0
Qt Version: 5.15.13

ADDITIONAL INFORMATION