| 1 | Afghanistan | Afghan Persian or Dari (official) 50%, Pashto (official) 35%, Turkic languages (primarily Uzbek and Turkmen) 11%, 30 minor languages (primarily Balochi and Pashai) 4%, much bilingualism, but Dari functions as the lingua franca. Note: the Turkic languages Uzbek and Turkmen, as well as Balochi, Pashai, Nuristani, and Pamiri are the third official languages in areas where the majority speaks them |
| 2 | Akrotiri | English, Greek |
| 3 | Albania | Albanian 98.8% (official - derived from Tosk dialect), Greek 0.5%, other 0.6% (including Macedonian, Roma, Vlach, Turkish, Italian, and Serbo-Croatian), unspecified 0.1% (2011 est.) |
| 4 | Algeria | Arabic (official), French (lingua franca), Berber or Tamazight (official) dialects include Kabyle Berber (Taqbaylit), Shawiya Berber (Tacawit), Mzab Berber, Tuareg Berber (Tamahaq) |
| 5 | American Samoa | Samoan 88.6% (closely related to Hawaiian and other Polynesian languages), English 3.9%, Tongan 2.7%, other Pacific islander 3%, other 1.8%. Note: most people are bilingual (2010 est.) |
| 6 | Andorra | Catalan (official), French, Castilian, Portuguese |
| 7 | Angola | Portuguese (official), Bantu and other African languages |
| 8 | Anguilla | English (official) |
| 9 | Antigua and Barbuda | English (official), Antiguan creole |
| 10 | Argentina | Spanish (official), Italian, English, German, French, indigenous (Mapudungun, Quechua) |
| 11 | Armenia | Armenian (official) 97.9%, Kurdish (spoken by Yezidi minority) 1%, other 1% (2011 est.) |
| 12 | Aruba | Papiamento (official) (a creole language that is a mixture of Portuguese, Spanish, Dutch, English, and, to a lesser extent, French, as well as elements of African languages and the language of the Arawak) 69.4%, Spanish 13.7%, English (widely spoken) 7.1%, Dutch (official) 6.1%, Chinese 1.5%, other 1.7%, unspecified 0.4% (2010 est.) |
| 13 | Australia | English 76.8%, Mandarin 1.6%, Italian 1.4%, Arabic 1.3%, Greek 1.2%, Cantonese 1.2%, Vietnamese 1.1%, other 10.4%, unspecified 5% (2011 est.) |
| 14 | Austria | German (official nationwide) 88.6%, Turkish 2.3%, Serbian 2.2%, Croatian (official in Burgenland) 1.6%, other (includes Slovene, official in South Carinthia, and Hungarian, official in Burgenland) 5.3% (2001 est.) |
| 15 | Azerbaijan | Azerbaijani (Azeri) (official) 92.5%, Russian 1.4%, Armenian 1.4%, other 4.7% (2009 est.) |
| 16 | Bahamas, The | English (official), Creole (among Haitian immigrants) |
| 17 | Bahrain | Arabic (official), English, Farsi, Urdu |
| 18 | Bangladesh | Bangla 98.8% (official, also known as Bengali), other 1.2% (2011 est.) |
| 19 | Barbados | English (official), Bajan (English-based creole language, widely spoken in informal settings) |
| 20 | Belarus | Russian (official) 70.2%, Belarusian (official) 23.4%, other 3.1% (includes small Polish- and Ukrainian-speaking minorities), unspecified 3.3% (2009 est.) |
| 21 | Belgium | Dutch (official) 60%, French (official) 40%, German (official) less than 1% |
| 22 | Belize | English 62.9% (official), Spanish 56.6%, Creole 44.6%, Maya 10.5%, German 3.2%, Garifuna 2.9%, other 1.8%, unknown 0.3%, none 0.2% (cannot speak). Note: shares sum to more than 100% because some respondents gave more than one answer on the census (2010 est.) |
| 23 | Benin | French (official), Fon and Yoruba (most common vernaculars in south), tribal languages (at least six major ones in north) |
| 24 | Bermuda | English (official), Portuguese |
| 25 | Bhutan | Sharchhopka 28%, Dzongkha (official) 24%, Lhotshamkha 22%, other 26% (includes foreign languages) (2005 est.) |
| 26 | Bolivia | Spanish (official) 60.7%, Quechua (official) 21.2%, Aymara (official) 14.6%, foreign languages 2.4%, Guarani (official) 0.6%, other native languages 0.4%, none 0.1%. Note: Bolivia's 2009 constitution designates Spanish and all indigenous languages as official 36 indigenous languages are specified, including some that are extinct (2001 est.) |
| 27 | Bosnia and Herzegovina | Bosnian (official), Croatian (official), Serbian (official) |
| 28 | Botswana | Setswana 78.2%, Kalanga 7.9%, Sekgalagadi 2.8%, English (official) 2.1%, Sesarwa 1.9%, Sempukushu 1.7%, other 5.1%, unspecified 0.2% (2001 est.) |
| 29 | Brazil | Portuguese (official and most widely spoken language). Note: less common languages include Spanish (border areas and schools), German, Italian, Japanese, English, and a large number of minor Amerindian languages |
| 30 | British Virgin Islands | English (official) |