In today’s interconnected world, conducting international studies presents unique business opportunities and challenges, particularly in language. Understanding and engaging with diverse populations requires a nuanced approach, where language is critical.
Here are our suggestions for main and additional languages for country-specific surveys:
| Country | Main language for surveys | Also recommended to include languages |
| Afghanistan | Dari | Pashto |
| Albania | Albanian | |
| Algeria | Arabic | |
| Andorra | Spanish | |
| Angola | Portuguese | |
| Antigua and Barbuda | English | |
| Argentina | Spanish | |
| Armenia | Armenian | |
| Australia | English | |
| Austria | German | |
| Azerbaijan | Azerbaijani | |
| Bahamas | English | |
| Bahrain | Arabic | |
| Bangladesh | Bengali | |
| Barbados | English | |
| Belarus | Russian | |
| Belgium | Dutch | French |
| Belize | English | |
| Benin | French | |
| Bhutan | Dzongkha | |
| Bolivia | Spanish | |
| Bosnia and Herzegovina | Bosnian | Croatian, Serbian |
| Botswana | English | |
| Brazil | Portuguese | |
| Brunei | Malay | |
| Bulgaria | Bulgarian | |
| Burkina Faso | French | |
| Burundi | English | |
| Cameroon | English | French |
| Canada | English | French |
| Cape Verde | Portuguese | |
| Central African Republic | French | |
| Chad | Arabic | French |
| Chile | Spanish | |
| China | Standard Chinese | |
| Colombia | Spanish | |
| Democratic Republic of the Congo | French | |
| Republic of the Congo | French | |
| Cook Islands | English | |
| Costa Rica | Spanish | |
| Croatia | Croatian | |
| Cuba | Spanish | |
| Cyprus | English | Turkish, Greek |
| Czech Republic | Czech | |
| Denmark | Danish | |
| Djibouti | French | English |
| Dominica | English | |
| Dominican Republic | Spanish | |
| East Timor | Portuguese | |
| Ecuador | Spanish | |
| Egypt | Arabic | |
| El Salvador | Spanish | |
| Equatorial Guinea | Spanish | French |
| Eritrea | Tigrinya | |
| Estonia | Estonian | |
| Eswatini | English | |
| Ethiopia | English | Oromo, Amharic |
| Fiji | English | |
| Finland | Finnish | |
| France | French | |
| Gabon | French | |
| Gambia | English | |
| Georgia | Georgian | |
| Germany | German | |
| Ghana | English | |
| Greece | Greek | |
| Grenada | English | |
| Guatemala | Spanish | |
| Guinea | French | |
| Guinea-Bissau | Portuguese | |
| Guyana | English | |
| Haiti | French | |
| Honduras | Spanish | |
| Hungary | Hungarian | |
| Iceland | Icelandic | |
| India | English | Hindi |
| Indonesia | Indonesian | |
| Iran | Persian | |
| Iraq | Arabic | Kurdish |
| Ireland | English | |
| Israel | Hebrew | |
| Italy | Italian | |
| Ivory Coast | French | |
| Jamaica | English | |
| Japan | Japanese | |
| Jordan | Arabic | |
| Kazakhstan | Kazakh | Russian |
| Kenya | English | Swahili |
| Kiribati | English | |
| North Korea | Korean | |
| South Korea | Korean | |
| Kosovo | Albanian | Serbian |
| Kuwait | Arabic | |
| Kyrgyzstan | Kyrgyz | Russian |
| Laos | Lao | |
| Latvia | Latvian | Russian |
| Lebanon | Arabic | |
| Lesotho | English | Sotho |
| Liberia | Liberia | |
| Libya | Arabic | |
| Liechtenstein | German | |
| Lithuania | Lithuanian | |
| Luxembourg | German | French |
| Madagascar | French | Malagasy |
| Malawi | English | Chichewa |
| Malaysia | Malay | |
| Maldives | English | Dhivehi |
| Mali | French | |
| Malta | English | Maltese |
| Marshall Islands | English | |
| Mauritania | Arabic | French |
| Mauritius | English | |
| Mexico | Spanish | |
| Federated States of Micronesia | English | |
| Moldova | Romanian | |
| Monaco | French | |
| Mongolia | Mongolian | |
| Montenegro | Montenegrin | |
| Morocco | Arabic | Berber |
| Mozambique | Portuguese | |
| Myanmar | Burmese | English |
| Namibia | English | |
| Nauru | English | Nauruan |
| Nepal | Nepali | English |
| Netherlands | Dutch | |
| New Zealand | English | Maori |
| Nicaragua | Spanish | |
| Niger | French | |
| Nigeria | English | |
| Niue | English | Niuean |
| Norfolk Island | English | Norfuk |
| North Macedonia | Macedonian | Albanian |
| Northern Cyprus | Turkish | |
| Norway | Norwegian | |
| Oman | Arabic | |
| Pakistan | English | Urdu |
| Palau | English | Palauan |
| Palestine | Arabic | |
| Panama | Spanish | |
| Papua New Guinea | English | |
| Paraguay | Spanish | Guarani |
| Peru | Spanish | Quechua, Aymara |
| Philippines | English | Tagalog |
| Poland | Polish | |
| Portugal | Portuguese | |
| Qatar | Arabic | |
| Romania | Romanian | |
| Russia | Russian | |
| Rwanda | English | Kinyarwanda, French |
| Saint Kitts and Nevis | English | |
| Saint Lucia | English | |
| Saint Vincent and the Grenadines | English | |
| Samoa | English | Samoan |
| San Marino | Italian | |
| São Tomé and Príncipe | Portuguese | |
| Saudi Arabia | Arabic | |
| Senegal | French | |
| Serbia | Serbian | |
| Seychelles | English | French |
| Sierra Leone | English | |
| Singapore | English | Malay, Standard Chinese |
| Slovakia | Slovak | |
| Slovenia | Slovene | |
| Solomon Islands | English | |
| Somalia | Arabic | Somali |
| Somaliland | English | Somali, Arabic |
| South Africa | English | |
| South Sudan | English | |
| Spain | Spanish | |
| Sri Lanka | English | Sinhala, Tamil |
| Sudan | English | Arabic |
| Suriname | Dutch | |
| Sweden | Swedish | |
| Switzerland | German | French, Italian |
| Syria | Arabic | Kurdish |
| Taiwan | Mandarin Chinese | |
| Tajikistan | Tajik | Russian |
| Tanzania | English | Swahili |
| Thailand | Thai | |
| Togo | Togo | |
| Tokelau | English | Tokelauan |
| Tonga | English | Tongan |
| Trinidad and Tobago | English | |
| Tunisia | Arabic | French |
| Turkey | Turkish | Kurdish |
| Turkmenistan | Russian | Turkmen |
| Tuvalu | English | Tuvaluan |
| Uganda | English | Swahili |
| Ukraine | Ukrainian | Russian |
| United Arab Emirates | English | Arabic |
| United Kingdom | English | |
| United States | English | Spanish |
| Uruguay | Spanish | |
| Uzbekistan | Russian | Uzbek |
| Vanuatu | English | French |
| Vatican City | Italian | |
| Venezuela | Spanish | |
| Vietnam | Vietnamese | |
| Yemen | Arabic | |
| Zambia | English | |
| Zimbabwe | English |