Quote from Zalewa
Names of some countries are untranslated in the Polish translation but I really didn't want to wear myself down for that.

$ grep "unfinished" ./src/core/translations/pl_PL.ts | wc -l
112

• Angola
  
• Anguilla
  
• Albania
  
• Andorra
  
• Netherlands Antilles
  
• United Arab Emirates
  
• Armenia
  
• American Samoa
  
• French Southern Territories
  
• Antigua and Barbuda
  
• Burundi
  
• Benin
  
• Burkina Faso
  
• Bahrain
  
• Bahamas
  
• Belize
  
• Bermuda
  
• Barbados
  
• Brunei
  
• Bhutan
  
• Bouvet Island
  
• Botswana
  
• Central African Republic
  
• Cocos (Keeling) Islands
  
• Congo, the Democratic Republic of the
  
• Congo
  
• Cook Islands
  
• Comoros
  
• Cape Verde
  
• Costa Rica
  
• Christmas Island
  
• Cayman Islands
  
• Djibouti
  
• Dominica
  
• Dominican Republic
  
• Eritrea
  
• Western Sahara
  
• Fiji
  
• Falkland Islands (Malvinas)
  
• Faroe Islands
  
• Micronesia, Federated States of
  
• Gabon
  
• Guernsey
  
• Ghana
  
• Guadeloupe
  
• Gambia
  
• Guinea-Bissau
  
• Equatorial Guinea
  
• French Guiana
  
• Guam
  
• Guyana
  
• Heard Island and McDonald Islands
  
• British Indian Ocean Territory
  
• Jersey
  
• Kiribati
  
• Saint Kitts and Nevis
  
• Lao People's Democratic Republic
  
• Lebanon
  
• Liberia
  
• Libya
  
• Saint Lucia
  
• Sri Lanka
  
• Lesotho
  
• Macao
  
• Marshall Islands
  
• Mali
  
• Myanmar
  
• Montenegro
  
• Northern Mariana Islands
  
• Montserrat
  
• Martinique
  
• Mauritius
  
• Malawi
  
• Mayotte
  
• Namibia
  
• New Caledonia
  
• Niger
  
• Norfolk Island
  
• Nicaragua
  
• Niue
  
• Nauru
  
• Oman
  
• Pitcairn
  
• Palau
  
• French Polynesia
  
• Réunion
  
• South Georgia and the South Sandwich Islands
  
• Saint Helena, Ascension and Tristan da Cunha
  
• Svalbard and Jan Mayen
  
• Solomon Islands
  
• Sierra Leone
  
• El Salvador
  
• Saint Pierre and Miquelon
  
• Sao Tome and Principe
  
• Swaziland
  
• Seychelles
  
• Syrian Arab Republic
  
• Turks and Caicos Islands
  
• Togo
  
• Tokelau
  
• Timor-Leste
  
• Tonga
  
• Trinidad and Tobago
  
• Tuvalu
  
• Tanzania, United Republic of
  
• Holy See (Vatican City State)
  
• Saint Vincent and the Grenadines
  
• Virgin Islands, British
  
• Virgin Islands, U.S.
  
• Vanuatu
  
• Wallis and Futuna
  
• Zambia