| Name | Other Name | Family | Nativ Name | ISO6391 Code | ISO6392T Code | ISO6392B Code | ISO6393 Code | Notes |
|---|---|---|---|---|---|---|---|---|
| Belarusian | Indo-European | беларуская мова | be | bel | bel | bel | ||
| Bambara | Niger–Congo | bamanankan | bm | bam | bam | bam | ||
| Bashkir | Turkic | башҡорт теле | ba | bak | bak | bak | ||
| Azerbaijani | Turkic | azərbaycan dili | az | aze | aze | aze + 2 | macrolanguage | |
| Aymara | Aymaran | aymar aru | ay | aym | aym | aym + 2 | macrolanguage | |
| Avestan | Indo-European | avesta | ae | ave | ave | ave | ancient | |
| Avaric | Northeast Caucasian | авар мацӀ; магӀарул мацӀ | av | ava | ava | ava | also known as Avar | |
| Assamese | Indo-European | অসমীয়া | as | asm | asm | asm | ||
| Aragonese | Indo-European | aragonés | an | arg | arg | arg | ||
| Arabic | Afro-Asiatic | العربية | ar | ara | ara | ara + 30 | macrolanguage; Standard Arabic is [arb] |