| Assan | |
| Assangori | |
| Assiniboine | |
| Assyrian Neo-Aramaic | |
| Asturian | |
| Asue Awyu | |
| Asumboa | |
| Asunción Mixtepec Zapotec | |
| Asu (Nigeria) | |
| Asuri | |
| Asu (Tanzania) | |
| Ata | |
| Atakapa | |
| Ata Manobo | |
| Atampaya | |
| Atatláhuca Mixtec | |
| Atauran | |
| Atayal | |
| Atemble | |
| Athpariya | |
| Ati | |
| Atikamekw | |
| Atohwaim | |
| Atong (Cameroon) | |
| Atong (India) | |
| Atorada | |
| Atsahuaca | |
| Atsam | |
| Atsugewi | |
| Attapady Kurumba | |
| Attié | |
| Atzingo Matlatzinca | |
| Au | |
| 'Auhelawa | |
| Aulua | |
| Aurá | |
| Aushi | |
| Aushiri | |
| Auslan | |
| Austral | |
| Australian Aborigines Sign Language | |
| Australian Sign Language | |
| Austrian Sign Language | |
| Auwe | |
| Auye | |
| Auyokawa | |
| Avá-Canoeiro | |
| Avaric | |
| Avatime | |
| Avau | |
| ISO 639-3 Reference Names |