| Aariya | |
| Acatenango Southwestern Cakchiquel | |
| Adap | |
| Aghu Tharnggalu | |
| Ahe | |
| Aiku | |
| Albay Bicolano | |
| Amapá Creole | |
| Amerax | |
| Amikoana | |
| Arafundi | |
| Arakanese | |
| Aramanik | |
| Atuence | |
| Auvergnat | |
| Ayi (China) | |
| Bachajón Tzeltal | |
| Bahau River Kenyah | |
| Bakung Kenyah | |
| Banawá | |
| Bandjigali | |
| Belgian Sign Language | |
| Bemba (Democratic Republic of Congo) | |
| Bengkulu | |
| Berawan | |
| Beti (Cameroon) | |
| Bogan | |
| Borna (Democratic Republic of Congo) | |
| Buxinhua | |
| Buya | |
| Buyang | |
| Carútana | |
| Cataelano Mandaya | |
| Central Mam | |
| Chajul Ixil | |
| Chamula Tzotzil | |
| Chan Santa Cruz Maya | |
| Chaungtha | |
| Chenalhó Tzotzil | |
| Chimakum | |
| Chorotega | |
| Chumash | |
| Cubulco Achí | |
| Cunén Quiché | |
| Darang Deng | |
| Darkhat | |
| Darwazi | |
| Dayao Yi | |
| Daza | |
| Dhanwar (India) | |
| ISO 639-3 Retired Reference Names |