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A
| Language name | Native name | Code |
|---|---|---|
| Abkhazian | Аҧсуа | ABK |
| Achinese | Bahsa Acèh | ACE |
| Acoli | - | ACH |
| Adangme | Adangbɛ | ADA |
| Adyghe; Adygei | Адыгэбзэ, Адыгабзэ | ADY |
| Afar | Afaraf | AAR |
| Afrihili | - | AFH |
| Afrikaans | Afrikaans | AFR |
| Afro-Asiatic languages | - | AFA |
| Ainu | アイヌ イタㇰ, Ainu Itak | AIN |
| Akan | - | AKA |
| Akkadian | Akkadû, Lišānum Akkadītum | AKK |
| Albanian | Shqip | ALB |
| Aleut | - | ALE |
| Algonquian languages | - | ALG |
| Altaic languages | - | TUT |
| Amharic | አማርኛ | AMH |
| Angika | - | ANP |
| Apache languages | - | APA |
| Arabic | العربية | ARA |
| Aragonese | Aragonés | ARG |
| Arapaho | Hinóno'eitíít | ARP |
| Arawak | - | ARW |
| Armenian | Հայերեն Լեզու | ARM |
| Aromanian; Arumanian; Macedo-Romanian | Armãneashce, Armãneashti, Limba Armãneascã | RUP |
| Artificial languages | - | ART |
| Assamese | অসমীয়া | ASM |
| Asturian; Bable; Leonese; Asturleonese | Asturianu, Bable, Llionés, Asturllionés | AST |
| Athapascan languages | - | ATH |
| Australian languages | - | AUS |
| Austronesian languages | - | MAP |
| Avaric | Авар Мацӏ, Магӏарул Мацӏ | AVA |
| Avestan | Avesta | AVE |
| Awadhi | अवधी | AWA |
| Aymara | Aymar Aru | AYM |
| Azerbaijani | Azərbaycanca | AZE |