B
- Bahamas
- English
- Bahrain
- Arabic
- Bangladesh
- Bengali
- Barbados
- English
- Belarus
- Belarusian
- Russian
- Belgium (Languages of Belgium)
- Dutch (Official only in Flanders, including Brussels)
- French (Official only in Brussels and in Wallonia, though not in the German-speaking Community of Belgium)
- German (Official only in the German-speaking Community of Belgium)
- Belize
- English (Official language)
- Kriol (the lingua franca)
- Spanish (Minority language spoken on the border with Mexico and Guatemala)
- Benin
- French
- Bhutan
- Dzongkha
- Bolivia
- Spanish
- Aymara
- Quechua
- Bosnia and Herzegovina
- Bosnian
- Croatian
- Serbian
- Botswana
- English
- Tswana (national)
- Brazil
- Portuguese (national, all cities)
- German (in Pomerode, Santa Catarina)
- Pomeranian (in Pancas and Santa Maria de Jetibá, in Espírito Santo)
- Hunsrückisch (in Antônio Carlos, Santa Catarina)
- Talian (in Serafina Corrêa, Rio Grande do Sul)
- Nheengatu, Baniwa and Tucano (in São Gabriel da Cachoeira, Amazonas)
- Guarani (in Tacuru, Mato Grosso do Sul)
- Brunei
- Malay
- Bulgaria
- Bulgarian
- Burkina Faso
- French
- Fula (national)
- Jula (national)
- More (national)
- Burundi
- French
- Kirundi
Read more about this topic: List Of Official Languages By State