| Afghanistan | Dari, Pashto |
| Albania | Albanian |
| Algeria | Arabic, French, Berber |
| Andorra | Catalan (official language), Spanish, French |
| Angola | Portuguese (official), Umbundu, Kimbundu, Kikongo |
| Antigua and Barbuda | English |
| Argentina | Spanish |
| Armenia | Armenian, Russian |
| Australia | English |
| Austria | German |
| Azerbaijan | Azeri, Russian |
| Bahrain | Arabic |
| Bangladesh | Bengali |
| Barbados | English (Bajan, an English-African dialect, is widely used) |
| Belarus | Russian, Belarussian (both official) |
| Belgium | Dutch, French, German |
| Belize | English (official), Spanish, Belizean Creole, Mayan, Garifuna (Carib) |
| Benin | French (official) Fon, Ge, Bariba, Yoruba, Dendi |
| Bhutan | Dzongkha (official) |
| Bolivia | Spanish, Quechua, Aymara, Guarani |
| Botswana | English (official), Setswana |
| Brazil | Portuguese |
| Brunei | Malay, English, Chinese |
| Bulgaria | Bulgarian |
| Burkina Faso | French, indigenous languages |
| Burma | Burmese, indigenous ethnic languages |
| Burundi | Kirundi (official), French (official), Swahili |
| Cambodia | Khmer |
| Cameroon | French, English, languages of Bantu, Semi-Bantu and Sudanic groups |
| Canada | English, French (both official) |
| Cape Verde | Portuguese, Crioulo (a mixture of archaic Portuguese and African words) |
| Chad | French, Arabic |
| Chile | Spanish |
| China | Mandarin Chinese |
| Colombia | Spanish |
| Comoros | Arabic, French, Comoran (a blend of Swahili and Arabic) |
| Cook Islands | English and Cook Islands Maori |
| Costa Rica | Spanish (official), English |
| Cote d'Ivoire | French, indigenous languages |
| Croatia | Croatian |
| Cuba | Spanish |
| Cyprus | Greek, Turkish |
| Czech Republic | Czech |
| Democratic Republic of the Congo | French, Lingala, Kiswahili, Kikongo, Tshiluba |
| Denmark | Danish |
| Djibouti | French, Arabic, Somali, Afar |
| Dominica | English (official), French patois |
| East Timor | Tetum and Portuguese (official), Indonesian and English (working languages) |
| Ecuador | Spanish, indigenous languages |
| Egypt | Arabic |
| El Salvador | Spanish |
| Equatorial Guinea | Spanish, French |
| Eritrea | Tigrinya, Tigre, Arabic, English |
| Estonia | Estonian, Russian |
| Ethiopia | Amharic, Oromo, Tigrinya, Somali |
| Federated States of Micronesia | English, Trukese, Pohnpeian, Yapese, Kosrean |
| Fiji | English, Fijian, Hindi |
| Finland | Finnish, Swedish |
| France | French |
| French Polynesia | Tahitian and French |
| Gabon | French, Bantu-group languages |
| Gambia | English (official), Mandinka, Wolof, Fula |
| Georgia | Georgian, Russian widely spoken |
| Germany | German |
| Ghana | English, African languages including Akan, Ewe |
| Greece | Greek |
| Grenada | English (official), French patois |
| Guam | English, Chamorro (both official) |
| Guatemala | Spanish, more than 20 indigenous languages |
| Guinea | French, Susu, Fulani, Mandingo |
| Guinea-Bissau | Portuguese, Crioulo, African languages |
| Guyana | English, indigenous languages, Creole, Hindi, Urdu |
| Haiti | Creole, French |
| Honduras | Spanish, indigenous languages, English |
| Hong Kong | Chinese (mainly Cantonese), English (both official) |
| Hungary | Hungarian |
| Iceland | Icelandic |
| India | Hindi, English and more than 20 other official languages |
| Indonesia | Indonesian, 300 regional languages |
| Iran | Persian |
| Iraq | Arabic, Kurdish |
| Ireland | English, Irish |
| Israel | Hebrew, Arabic |
| Italy | Italian |
| Jamaica | English (official), English patois |
| Japan | Japanese |
| Jordan | Arabic |
| Kazakhstan | Kazakh, Russian |
| Kenya | Swahili, English |
| Kiribati | English, Gilbertese |
| Kuwait | Arabic |
| Kyrgyzstan | Kyrgyz, Russian |
| Laos | Lao, French (for diplomatic purposes) |
| Latvia | Latvian, Russian |
| Lebanon | Arabic |
| Lesotho | Sesotho, English |
| Liberia | English, 29 African languages belonging to the Mande, Kwa or Mel linguistic groups |
| Libya | Arabic |
| Liechtenstein | German |
| Lithuania | Lithuanian (official), Russian, Polish, Belarusian |
| Luxembourg | French, German, Luxembourgish |
| Macau | Chinese (mainly Cantonese), Portuguese (both official) |
| Madagascar | Malagasy (official), French |
| Malawi | English, Chichewa (both official) |
| Malaysia | Malay (official), English, Chinese dialects, Tamil, Telugu, Malayalam |
| Mali | French, Bambara, Berber, Arabic |
| Malta | Maltese, English |
| Marshall Islands | Marshallese, English |
| Mauritania | Arabic (official), French, others |
| Mauritius | English (official), Creole, French, Indian languages |
| Mexico | Spanish |
| Moldova | Romanian (called "Moldovan" in official documents), Russian |
| Monaco | French |
| Mongolia | Mongolian |
| Montenegro | Serbian, Montenegrin |
| Morocco | Arabic and Berber (official), French, Spanish |
| Mozambique | Portuguese (official), several indigenous languages |
| Namibia | English (official), Afrikaans, German, Oshivambo, Herero, Nama |
| Nauru | Nauruan, English |
| Netherlands | Dutch |
| New Caledonia | French (official), Melanesian and Polynesian dialects |
| New Zealand | English, Maori |
| Nicaragua | Spanish, English, indigenous languages |
| Niger | French (official), Arabic, Hausa, Songhai |
| Nigeria | English (official), Yoruba, Ibo, Hausa |
| Niue | Niuean, English |
| North Korea | Korean |
| Norway | Norwegian |
| Oman | Arabic |
| Pakistan | English, Urdu, Punjabi, Sindhi, Pashto, Balochi |
| Palau | Palauan, English |
| Panama | Spanish, English |
| Papua New Guinea | English, Tok Pisin, Hiri Motu |
| Paraguay | Spanish, Guarani |
| Peru | Spanish, Quechua, Aymara |
| Philippines | Filipino, English (both official) |
| Poland | Polish |
| Portugal | Portuguese |
| Puerto Rico | Spanish, English (both official) |
| Qatar | Arabic |
| Republic of Macedonia | Macedonian, Albanian |
| Romania | Romanian |
| Russia | Russian |
| Rwanda | Kinyarwanda (official), French (official), English (official), Swahili |
| Saint Kitts and Nevis | English |
| Saint Lucia | English (official), French patois |
| Samoa | Samoan, English |
| San Marino | Italian |
| Sao Tome and Principe | Portuguese |
| Saudi Arabia | Arabic |
| Senegal | French (official), Wolof |
| Serbia | Serbian |
| Seychelles | English, French, Creole |
| Sierra Leone | English, Krio (Creole language derived from English) and a range of African languages |
| Singapore | English, Malay, Mandarin, Tamil |
| Slovakia | Slovak |
| Slovenia | Slovene |
| Solomon Islands | English (official), Melanesian dialects |
| Somalia | Somali, Arabic, Italian, English |
| South Africa | 11 official languages including English, Afrikaans, Sesotho, Setswana, Xhosa and Zulu |
| South Korea | Korean |
| South Sudan | English, Arabic (both official), Juba Arabic, Dinka, others |
| Spain | Spanish (Castilian), Catalan and its variant Valencian, Gallego (Galician), Euskera (Basque) |
| Sri Lanka | Sinhala, Tamil, English |
| Sudan | Arabic, English (official) |
| Suriname | Dutch (official), English, Sranang Tongo, Hindi, Javanese |
| Swaziland | Swazi, English (both official) |
| Sweden | Swedish |
| Switzerland | German, French, Italian, Romansch |
| Syria | Arabic |
| Taiwan | Mandarin Chinese (official), Min Nan Chinese (Taiwanese), Hakka |
| Tajikistan | Tajik, Uzbek, Russian |
| Tanzania | English, Swahili |
| Thailand | Thai |
| The Bahamas | English |
| Togo | French (official), local languages |
| Tokelau | Tokelauan, English |
| Tonga | Tongan, English |
| Trinidad and Tobago | English |
| Tunisia | Arabic (official); French |
| Turkey | Turkish (official), Kurdish |
| Turkmenistan | Turkmen, Russian |
| Tuvalu | Tuvaluan, English |
| Uganda | English (official), Swahili (official), Luganda, various Bantu and Nilotic languages |
| Ukraine | Ukrainian (official), Russian |
| United Arab Emirates | Arabic |
| United Kingdom | English |
| United States | English |
| Uruguay | Spanish |
| Uzbekistan | Uzbek, Russian, Tajik |
| Vanuatu | Bislama, French, English |
| Venezuela | Spanish, indigenous languages |
| Vietnam | Vietnamese |
| Yemen | Arabic |
| Zambia | English (official), Bemba, Lozi, Nyanja, Tonga |
| Zimbabwe | English (official), Shona, Sindebele |
