| hmdA-Hmao | hmd | Hmong–Mien | | | 5 · Developing |
| apqA-Pucikwar | apq | Andamanese | | | 10 · Extinct |
| aiwAari | aiw | Afroasiatic | | 253,000 | 4 · Educational |
| kbtAbadi | kbt | — | | 4,300 | 5 · Developing |
| abgAbaga | abg | Trans–New Guinea | | 5 | 6a · Vigorous |
| abfAbai Sungai | abf | — | | | 7 · Shifting |
| abxAbaknon | abx | Austronesian | | 21,400 | 4 · Educational |
| bvvAbane | bvv | — | | | 10 · Extinct |
| abmAbanyom | abm | Niger–Congo | | 12,500 | 6a · Vigorous |
| aauAbau | aau | Sepik | | 7,270 | 5 · Developing |
| abqAbazaабаза | abq | North Caucasian | | 37,831 | 5 · Developing |
| abaAbé | aba | Niger–Congo | | | 5 · Developing |
| abpAbellen | abp | — | | 3,000 | 6b · Threatened |
| abiAbidji | abi | Niger–Congo | | 51,000 | 5 · Developing |
| bsaAbinomn | bsa | — | | 300 | 6b · Threatened |
| axbAbipón | axb | Guaicuruan | | | |
| abkAbkhazАԥсуа бызшәа | abk | North Caucasian | +3 | 190,110 | 2 · Provincial |
| aboAbon | abo | Niger–Congo | | 1,000 | 6b · Threatened |
| tbwAborlan Tagbanwa | tbw | Austronesian | | | 5 · Developing |
| aahAbu’ Arapesh | aah | Torricelli | | 2,560 | 6b · Threatened |
| abnAbua | abn | Niger–Congo | | | 6a · Vigorous |
| abzAbuibahasa Abui | abz | Trans–New Guinea | | | 6a · Vigorous |
| kgrAbunbahasa A Nden | kgr | — | | 3,000 | 6b · Threatened |
| ablAbungCaba Abbung | abl | Austronesian | | | 6a · Vigorous |
| abuAbure | abu | Niger–Congo | | 93,000 | 6a · Vigorous |
| mgjAbureni | mgj | Niger–Congo | | | 6a · Vigorous |
| tpxAcatepec Me'phaa | tpx | Central American Indian languages | | | 6a · Vigorous |
| aceAcehnesebahsa Acèh | ace | Austronesian | | 3.5 m | 6b · Threatened |
| acnAchang | acn | Sino-Tibetan | | | 7 · Shifting |
| acaAchawa | aca | Upper Amazon Arawakan | | 514 | 6b · Threatened |
| guqAché | guq | Tupian | | | 5 · Developing |
| yifAche Yi | yif | Sino-Tibetan | | | 6b · Threatened |
| aczAcheron | acz | Niger–Congo | | | 5 · Developing |
| acrAchi | acr | Central American Indian languages | | | 6b · Threatened |
| achAcholi | ach | Nilo-Saharan | | 1.2 m | 5 · Developing |
| lrlAchomi | lrl | Indo-European | +3 | 100,000 | 6a · Vigorous |
| actAchterhooks | act | Indo-European | | | 5 · Developing |
| acuAchuar | acu | Jivaroan-Cahuapanan | | | 5 · Developing |
| acvAchumawi | acv | — | | | 8b · Nearly Extinct |
| acsAcroá | acs | Macro-Jê | | | 10 · Extinct |
| adbAdabe | adb | — | | | 6a · Vigorous |
| fubAdamaua-Fulfulde | fub | Niger–Congo | | | 3 · Wider Communication |
| adsAdamorobe Sign Language | ads | — | | | 6a · Vigorous |
| adnAdangbahasa Adang | adn | Trans–New Guinea | | 3,000 | 6b · Threatened |
| kadAdara | kad | — | | | 6a · Vigorous |
| tiuAdasen | tiu | Austronesian | | | 5 · Developing |
| adeAdele | ade | Niger–Congo | | | 5 · Developing |
| adhAdhola | adh | Nilo-Saharan | | 480,000 | 5 · Developing |
| adiAdi | adi | Sino-Tibetan | | | 5 · Developing |
| dthAdithinngithigh | dth | Australian Aboriginal languages | | | 10 · Extinct |
| ortAdivasi Oriya | ort | Indo-European | | | 5 · Developing |
| ajgAdja | ajg | Niger–Congo | | 1.1 m | 5 · Developing |
| adoAdjora | ado | Ramu–Lower Sepik | | | 6a · Vigorous |
| adjAdjukru | adj | Niger–Congo | | 100,000 | 5 · Developing |
| adtAdnyamathanha | adt | Australian Aboriginal languages | | | 8b · Nearly Extinct |
| adrAdonarabahasa Adonara | adr | Austronesian | | 98,000 | 6a · Vigorous |
| aduAduge | adu | Niger–Congo | | | 6b · Threatened |
| adyAdygheАдыгабзэ | ady | North Caucasian | +1 | 575,900 | 2 · Provincial |
| azrAdzera | azr | Austronesian | | 30,000 | 4 · Educational |
| aezAeka | aez | Trans–New Guinea | | | 5 · Developing |
| aeqAer | aeq | Indo-European | | | 6b · Threatened |
| aalAfade | aal | Afroasiatic | | | 6b · Threatened |
| aarAfarAfar-af | aar | Afroasiatic | | 1.6 m | 2 · Provincial |
| afgAfghan Sign Language | afg | — | | | 5 · Developing |
| aftAfitti | aft | — | | | 6b · Threatened |
| ulfAframabahasa Usku | ulf | — | | | 8a · Moribund |
| afrAfrikaans | afr | Indo-European | +2 | 7.2 m | 1 · National |
| afsAfro-Seminole Creole | afs | — | | 200 | 8a · Moribund |
| agdAgarabi | agd | — | | 27,000 | 6a · Vigorous |
| agiAgariya | agi | Austroasiatic | | 72,000 | 6a · Vigorous |
| agcAgatu | agc | Niger–Congo | | | 6a · Vigorous |
| avoAgavotaguerra | avo | — | | | 10 · Extinct |
| agqAghem | agq | — | | | 5 · Developing |
| ahhAghubahasa Aghu | ahh | Trans–New Guinea | | 3,000 | 6b · Threatened |
| gtuAghu Tharrnggala | gtu | Australian Aboriginal languages | | | 10 · Extinct |
| agxAghul | agx | Northeast Caucasian | | 29,300 | 6a · Vigorous |
| aifAgi | aif | Torricelli | | | 6a · Vigorous |
| kitAgob | kit | — | | | 5 · Developing |
| ibmAgoi | ibm | Niger–Congo | | | 6a · Vigorous |
| adqAgotime | adq | Niger–Congo | | | 6b · Threatened |
| agaAguano | aga | — | | | 10 · Extinct |
| agrAguaruna | agr | Jivaroan-Cahuapanan | | 56,584 | 4 · Educational |
| augAguna | aug | Niger–Congo | | | 6a · Vigorous |
| agnAgutaynen | agn | Austronesian | | | 5 · Developing |
| ahaAhanta | aha | Niger–Congo | | | 5 · Developing |
| esgAheri Gondi | esg | Dravidian | | 150,000 | 5 · Developing |
| ahrAhirani | ahr | Indo-European | | | 6a · Vigorous |
| ahlAhlon | ahl | Niger–Congo | | | 5 · Developing |
| ahoAhom | aho | Kra–Dai | | | 9 · Second language only |
| ahtAhtnaAtnakenaege’ | aht | Na-Dene | | 80 | 8a · Moribund |
| aihAi-Cham | aih | Kra–Dai | | | 6b · Threatened |
| aixAigon | aix | Austronesian | | | 6a · Vigorous |
| tbaAikanã | tba | — | | 200 | 6b · Threatened |
| mwgAiklep | mwg | Austronesian | | | 6a · Vigorous |
| aiqAimaq | aiq | Indo-European | | | 6a · Vigorous |
| ailAimele | ail | Bosavi | | | 7 · Shifting |
| aimAimol | aim | Sino-Tibetan | | | 6b · Threatened |
| aicAinbai | aic | — | | | 8a · Moribund |
| ainAinuAynu itak | ain | — | | 10 | 9 · Dormant |
| akiAiome | aki | Ramu–Lower Sepik | | | 6a · Vigorous |
| thzAir Tamajeq | thz | Afroasiatic | | 250,000 | 4 · Educational |
| airAiroranbahasa Adora | air | Tor-Kwerba | | 1,000 | 6a · Vigorous |
| aioAiton | aio | Kra–Dai | | | 6b · Threatened |
| nflÄiwoo | nfl | Austronesian | | 8,400 | 6a · Vigorous |
| ajaAja | aja | Nilo-Saharan | | | 8b · Nearly Extinct |
| ajwAjawa | ajw | Afroasiatic | | | 10 · Extinct |
| ajiAjië | aji | Austronesian | | 5,400 | 5 · Developing |
| akqAk | akq | Sepik | | | 8b · Nearly Extinct |
| axkAka | axk | Niger–Congo | | | 5 · Developing |
| abjAka-Bea | abj | Andamanese | | | 10 · Extinct |
| akmAka-Bo | akm | — | | | 10 · Extinct |
| aciAka-Cari | aci | Andamanese | | | 10 · Extinct |
| akjAka-Jeru | akj | Andamanese | | | 10 · Extinct |
| akxAka-Kede | akx | Andamanese | | | 10 · Extinct |
| akyAka-Kol | aky | Andamanese | | | 10 · Extinct |
| ackAka-Kora | ack | Andamanese | | | 10 · Extinct |
| akaAkanakan | aka | Niger–Congo | | 8.3 m | 3 · Wider Communication |
| aclAkar-Bale | acl | Andamanese | | | 10 · Extinct |
| knjAkateko | knj | Central American Indian languages | | | 4 · Educational |
| akeAkawaio | ake | Cariban | | | 6b · Threatened |
| aikAke | aik | Niger–Congo | | | 6a · Vigorous |
| tsrAkei | tsr | Austronesian | | | 6a · Vigorous |
| aeuAkeu | aeu | Sino-Tibetan | | | 6a · Vigorous |
| ahkAkha | ahk | Sino-Tibetan | +2 | 600,000 | 5 · Developing |
| akvAkhvakh | akv | Northeast Caucasian | | 210 | 6b · Threatened |
| akkAkkadianlišānum akkadītum | akk | Afroasiatic | | | |
| siaAkkala Sami | sia | Uralic | | | 9 · Dormant |
| aklAklan | akl | Austronesian | | | 4 · Educational |
| aqgAkoko | aqg | Niger–Congo | | | 6a · Vigorous |
| miwAkoye | miw | Trans–New Guinea | | 600 | 5 · Developing |
| akfAkpa | akf | Niger–Congo | | | 6a · Vigorous |
| ibeAkpes | ibe | Niger–Congo | | | 6a · Vigorous |
| akdAkpet | akd | Niger–Congo | | | 6a · Vigorous |
| afiAkrukay | afi | Ramu–Lower Sepik | | | 7 · Shifting |
| spmAkukem | spm | Ramu–Lower Sepik | | | 6a · Vigorous |
| akuAkum | aku | Niger–Congo | | | 6a · Vigorous |
| aqzAkuntsu | aqz | Tupian | | | 8b · Nearly Extinct |
| akoAkurio | ako | Cariban | | | 9 · Dormant |
| asuAkwáwa | asu | Tupian | | 999 | Definitely endangered |
| nqyAkyaung Ari | nqy | — | | | 6a · Vigorous |
| syyAl-Sayyid Bedouin Sign Language | syy | — | | | 6a · Vigorous |
| alwAlaba-K’abeena | alw | — | | 287,000 | 4 · Educational |
| akzAlabamaAlbaamo innaaɬiilka | akz | Muskogean | | 100 | 6b · Threatened |
| dulAlabat Island Agta | dul | Austronesian | | | 8a · Moribund |
| alaAlago | ala | Niger–Congo | | | 6a · Vigorous |
| wbjAlagwa | wbj | Afroasiatic | | 53,000 | 6b · Threatened |
| ampAlamblak | amp | Sepik | | 1,500 | 5 · Developing |
| aljAlangan | alj | Austronesian | | 2,150 | 6b · Threatened |
| btzAlas | btz | Austronesian | | | 6a · Vigorous |
| alhAlawa | alh | Australian Aboriginal languages | | 12 | 8b · Nearly Extinct |
| sqiAlbanianGjuha shqipe | sqi | — | | 6.2 m | Safe |
| sqkAlbanian Sign LanguageGjuha e Shenjave Shqipe | sqk | — | | 3,000 | 5 · Developing |
| zasAlbarradas Zapotec | zas | Central American Indian languages | | | 5 · Developing |
| alfAlege | alf | Niger–Congo | | | 6a · Vigorous |
| gahAlekano | gah | Trans–New Guinea | | 25,000 | 7 · Shifting |
| gswAlemannicAlemannisch | gsw | Indo-European | +4 | 10 m | 5 · Developing |
| aleAleut | ale | — | | 200 | 8a · Moribund |
| arqAlgerian Arabicدريرية | arq | Afroasiatic | | 42.3 m | 3 · Wider Communication |
| aaoAlgerian Saharan Arabic | aao | Afroasiatic | | | 6a · Vigorous |
| alqAlgonquinAnicinàbemowin | alq | Algic | | 2,430 | 6b · Threatened |
| aiyAli | aiy | Niger–Congo | | | 6a · Vigorous |
| aldAlladian | ald | Niger–Congo | | | 5 · Developing |
| allAllar | all | Dravidian | | | 7 · Shifting |
| aidAlngith | aid | Australian Aboriginal languages | | | 10 · Extinct |
| zaqAloápam Zapotec | zaq | Central American Indian languages | | | 6a · Vigorous |
| aolAloresebahasa Alor | aol | Austronesian | | 25,000 | 6a · Vigorous |
| xuaAlu Kurumba | xua | Dravidian | | | 6a · Vigorous |
| aabAlumu | aab | Niger–Congo | | | 6a · Vigorous |
| alpAlunebahasa Alune | alp | Austronesian | | 17,000 | 6b · Threatened |
| ynaAluo | yna | Sino-Tibetan | | | 7 · Shifting |
| alzAlur | alz | Nilo-Saharan | | | 5 · Developing |
| emsAlutiiq | ems | — | | 450 | 8a · Moribund |
| avdAlviri-Vidari | avd | Indo-European | | | 7 · Shifting |
| alrAlyutornəməlʔu | alr | — | | 11 | 8b · Nearly Extinct |
| amqAmahai | amq | Austronesian | | 50 | 8b · Nearly Extinct |
| amcAmahuaca | amc | Pano-Tacanan | | 310 | 7 · Shifting |
| aliAmaimon | ali | — | | 1,800 | 6a · Vigorous |
| aadAmal | aad | Sepik | | | 6a · Vigorous |
| amnAmanab | amn | Border | | 4,400 | 5 · Developing |
| amaAmanayé | ama | Tupian | | | 9 · Dormant |
| aieAmara | aie | Austronesian | | | 6b · Threatened |
| amrAmarakaeri | amr | — | | 500 | 6b · Threatened |
| aazAmarasibahasa Amarasi | aaz | Austronesian | | | 5 · Developing |
| zpoAmatlán Zapotec | zpo | Central American Indian languages | | | 5 · Developing |
| spqAmazonic Spanish | spq | — | | | 6a · Vigorous |
| utpAmba | utp | Austronesian | | | 6a · Vigorous |
| rwmAmba | rwm | Niger–Congo | | 40,100 | 6b · Threatened |
| amkAmbaibahasa Ambai | amk | — | | | 6b · Threatened |
| aewAmbakich | aew | Ramu–Lower Sepik | | | 7 · Shifting |
| amvAmbelaubahasa Ambelau | amv | Austronesian | | 1,347 | 6a · Vigorous |
| akcAmberbakenbahasa Dekwambre | akc | — | | | 6b · Threatened |
| almAmblong | alm | Austronesian | | | 6b · Threatened |
| ambAmbo | amb | — | | | 6b · Threatened |
| absAmbonese | abs | Austronesian | | | 3 · Wider Communication |
| aagAmbrak | aag | Torricelli | | 290 | 6b · Threatened |
| amjAmdang | amj | Nilo-Saharan | | | 6a · Vigorous |
| adxAmdo Tibetanཨ་མདོའི་སྐད། | adx | — | | 810,000 | 6a · Vigorous |
| aseAmerican Sign Language𝣷𝪜 𝤃𝪜 𝣜𝪜 | ase | — | | 250,000 | 5 · Developing |
| amhAmharicአማርኛ | amh | Afroasiatic | +2 | 25 m | 1 · National |
| amyAmi | amy | Daly | | 30 | 8a · Moribund |
| amiAmis | ami | Austronesian | | 215,000 | 5 · Developing |
| hucǂ’Amkoe | huc | Khoisan | | | 8b · Nearly Extinct |
| kuiAmonap | kui | Cariban | | 1,000 | 6b · Threatened |
| apgAmpanang | apg | — | | | 6a · Vigorous |
| ajzAmri | ajz | — | | | 5 · Developing |
| amtAmto | amt | — | | | 6a · Vigorous |
| uhnAmungbahasa Amung | uhn | Trans–New Guinea | | 14,000 | 6b · Threatened |
| amgAmurdag | amg | Australian Aboriginal languages | | | 8b · Nearly Extinct |
| anwAnaang | anw | Niger–Congo | | | 5 · Developing |
| akgAnakalangubahasa Anakalangu | akg | Austronesian | | | 6a · Vigorous |
| pdaAnam | pda | Trans–New Guinea | | | 6b · Threatened |
| aanAnambé | aan | Tupian | | | 8b · Nearly Extinct |
| bpoAnasi | bpo | Geelvink Bay | | | 6b · Threatened |
| grcAncient GreekἈρχαία Ἑλληνική | grc | Indo-European | | | 9 · Second language only |
| xmkAncient Macedonian | xmk | Indo-European | | | |
| afdAndai | afd | Arafundi | | | 6a · Vigorous |
| xaaAndalusian Arabicعربية أندلسية | xaa | Afroasiatic | | | |
| hcaAndaman Creole Hindi | hca | — | | 20,000 | 6a · Vigorous |
| anaAndaqui | ana | — | | | 9 · Dormant |
| aodAndarum | aod | Ramu–Lower Sepik | | | 6a · Vigorous |
| adgAndegerebinha | adg | Australian Aboriginal languages | | | 9 · Dormant |
| aniAndi | ani | Northeast Caucasian | | 20,000 | 6b · Threatened |
| bzbAndiobahasa Imbao’o | bzb | — | | | 6b · Threatened |
| anbAndoa | anb | Saparo–Yawan | | | 10 · Extinct |
| anoAndoque | ano | — | | 370 | 8b · Nearly Extinct |
| anxAndra-Hus | anx | Austronesian | | | 6a · Vigorous |
| atyAneityum | aty | Austronesian | | | 5 · Developing |
| anzAnêm | anz | — | | 800 | 5 · Developing |
| myoAnfillo | myo | Afroasiatic | | | 8a · Moribund |
| aqtAngaité | aqt | Mascoian | | | 6a · Vigorous |
| njmAngami | njm | Sino-Tibetan | | | 3 · Wider Communication |
| yliAngguruk Yali | yli | Trans–New Guinea | | 15,000 | 5 · Developing |
| anpAngikaअंगिका | anp | Indo-European | | 740,000 | 5 · Developing |
| akbAngkola | akb | Austronesian | | | 6b · Threatened |
| xnoAnglo-Norman | xno | Indo-European | | | |
| rmeAngloromani | rme | Indo-European | | | 6a · Vigorous |
| aoaAngolar | aoa | Gulf of Guinea Creole | | | 6a · Vigorous |
| aggAngor | agg | — | | | 6b · Threatened |
| aogAngoram | aog | Ramu–Lower Sepik | | | 6a · Vigorous |
| awgAnguthimri | awg | Australian Aboriginal languages | | | 9 · Dormant |
| hnhǁAni | hnh | Khoisan | | | 6b · Threatened |
| bloAnii | blo | Niger–Congo | | | 5 · Developing |
| anfAnimere | anf | Niger–Congo | | | 8a · Moribund |
| aoiAnindilyakwa | aoi | Australian Aboriginal languages | | 1,283 | 6a · Vigorous |
| fabAnnobonese Creole | fab | Gulf of Guinea Creole | | 5,600 | 6a · Vigorous |
| anjAnor | anj | Ramu–Lower Sepik | | | 6a · Vigorous |
| ansAnserma | ans | Choco | | 100 | 10 · Extinct |
| andAnsusbahasa Ansus | and | Austronesian | | | 6b · Threatened |
| antAntakarinya | ant | Australian Aboriginal languages | | | 9 · Dormant |
| xmvAntankarana Malagasyantankarana | xmv | Austronesian | | | 6a · Vigorous |
| aigAntiguan and Barbudan CreoleAanteegan an' Baabyuudan | aig | — | +4 | 150,000 | 6a · Vigorous |
| anuAnuak | anu | Nilo-Saharan | | 140,000 | 5 · Developing |
| ckoAnufo | cko | Niger–Congo | | | 5 · Developing |
| auiAnuki | aui | — | | | 6b · Threatened |
| auqAnus | auq | Austronesian | | 70 | 7 · Shifting |
| audAnuta | aud | Austronesian | | | 8b · Nearly Extinct |
| anyAnyin | any | Niger–Congo | | | 5 · Developing |
| pniAohengbahasa Aoheng | pni | — | | | 6b · Threatened |
| aorAore | aor | Austronesian | | | 10 · Extinct |
| apyApalaí | apy | Cariban | | 650 | 5 · Developing |
| enaApali | ena | Trans–New Guinea | | | 5 · Developing |
| mipApasco-Apoala Mixtec | mip | Central American Indian languages | | | 6b · Threatened |
| aptApatani | apt | Sino-Tibetan | | | 6b · Threatened |
| apiApiaká | api | Tupian | | | 9 · Dormant |
| apnApinayé | apn | Macro-Jê | | | 5 · Developing |
| appApma | app | Austronesian | | 7,800 | 6a · Vigorous |
| ahpApro | ahp | Niger–Congo | | | 6b · Threatened |
| apuApurinã | apu | — | | | 6b · Threatened |
| pudAput | pud | — | | | 6b · Threatened |
| apxAputaibahasa Aputai | apx | Austronesian | | | 8b · Nearly Extinct |
| xaqAquitanian | xaq | Paleo-European languages | | | |
| ardArabana | ard | Australian Aboriginal languages | | | 8b · Nearly Extinct |
| arlArabela | arl | Saparo–Yawan | | 50 | 8a · Moribund |
| araArabicاللُّغَة العَرَبِيّة | ara | Afroasiatic | +36 | 315.4 m | Safe |
| argAragonesearagonés | arg | Indo-European | | 28,500 | 6b · Threatened |
| rkiArakanese Language | rki | Sino-Tibetan | | 765,000 | 3 · Wider Communication |
| akrAraki | akr | Austronesian | | | 8b · Nearly Extinct |
| rkwArakwal | rkw | Australian Aboriginal languages | | | 10 · Extinct |
| atqAralle-Tabulahan | atq | — | | 12,000 | 5 · Developing |
| aafAranadan | aaf | Dravidian | | 200 | 6b · Threatened |
| jbjArandaibahasa Arandai | jbj | Trans–New Guinea | | | 6b · Threatened |
| aroAraonaalaōna | aro | Pano-Tacanan | | 81 | 6b · Threatened |
| arpArapahoHinónoʼeitíít | arp | Algic | | 1,000 | 8a · Moribund |
| arjArapaso | arj | Tucanoan | | | 9 · Dormant |
| xajArarandewára | xaj | Tupian | | | 10 · Extinct |
| arwArawakLokono | arw | — | +1 | 2,500 | 8a · Moribund |
| awtAraweté | awt | Tupian | | | 6a · Vigorous |
| awmArawum | awm | — | | | 6a · Vigorous |
| aaeArbëresh | aae | — | | 100,000 | 6b · Threatened |
| arvArbore | arv | Afroasiatic | | 7,210 | 6a · Vigorous |
| aqcArchi | aqc | Northeast Caucasian | | 970 | 6b · Threatened |
| mwcAre | mwc | Austronesian | | 1,200 | 5 · Developing |
| alu'Are'are | alu | Austronesian | | 18,000 | 5 · Developing |
| aeaAreba | aea | Australian Aboriginal languages | | | 10 · Extinct |
| aemArem | aem | Austroasiatic | | | 8b · Nearly Extinct |
| aedArgentine Sign Language | aed | — | | | 5 · Developing |
| agjArgobba | agj | Afroasiatic | | 43,700 | 4 · Educational |
| agfArgunibahasa Arguni Bay | agf | Austronesian | | | 6b · Threatened |
| aqrArhâ | aqr | Austronesian | | | 8a · Moribund |
| aokArhö | aok | Austronesian | | | 8b · Nearly Extinct |
| arhArhuaco | arh | Chibchan | | | 5 · Developing |
| aacAri | aac | Trans–New Guinea | | 50 | 6b · Threatened |
| lazAribwatsa | laz | Austronesian | | | 10 · Extinct |
| yluAribwaung | ylu | — | | | 6b · Threatened |
| arkArikapú | ark | Macro-Jê | | | 9 · Dormant |
| ariArikara | ari | Caddoan | | 10 | 8b · Nearly Extinct |
| aitArikem | ait | Tupian | | | 10 · Extinct |
| lucAringa | luc | — | | | 5 · Developing |
| aohArma | aoh | Choco | | | |
| hyeArmenianհայերեն | hye | Indo-European | +20 | 6.7 m | 1 · National |
| aenArmenian Sign Language | aen | — | | | 6a · Vigorous |
| rupAromanianlimba armãneascã | rup | Indo-European | | 112,960 | 4 · Educational |
| apsArop | aps | Austronesian | | | 5 · Developing |
| aprArop-Lokep | apr | Austronesian | | | 5 · Developing |
| aiaArosi | aia | Austronesian | | | 5 · Developing |
| atzArta | atz | Austronesian | | | 8a · Moribund |
| arxAruá | arx | Tupian | | | 8a · Moribund |
| msyAruamu | msy | Ramu–Lower Sepik | | | 5 · Developing |
| atxArutani | atx | — | | 5 | 9 · Dormant |
| aatArvanitic | aat | — | | | 8a · Moribund |
| aszAs | asz | Austronesian | | | 6b · Threatened |
| aasAsa | aas | Afroasiatic | | | 8b · Nearly Extinct |
| mtvAsaro'o | mtv | Trans–New Guinea | | | 6a · Vigorous |
| cniAsháninka | cni | Southern Maipuran | | 73,567 | 5 · Developing |
| cjoAshéninka | cjo | Southern Maipuran | | 9,881 | 6b · Threatened |
| askAshkun | ask | Indo-European | | 40,000 | 6a · Vigorous |
| atnAshtiani | atn | Indo-European | | | 7 · Shifting |
| aslAsilulu | asl | Austronesian | | | 6b · Threatened |
| eivAskopan | eiv | North Bougainville | | | 6a · Vigorous |
| asmAssameseঅসমীয়া ভাষা | asm | Indo-European | | 15.3 m | 2 · Provincial |
| asbAssiniboine | asb | Hoka-Sioux | | | 8a · Moribund |
| aiiAssyrian Neo-Aramaic | aii | Afroasiatic | +3 | 232,300 | 6b · Threatened |
| astAsturianasturianu | ast | Indo-European | | 560,000 | 6b · Threatened |
| aumAsu | aum | — | | | 6a · Vigorous |
| psaAsue Awyubahasa Awyu Asue | psa | Trans–New Guinea | | | 6b · Threatened |
| auaAsumboa | aua | Austronesian | | | 8b · Nearly Extinct |
| zooAsunción Mixtepec Zapotec | zoo | Central American Indian languages | | | 8b · Nearly Extinct |
| asrAsur | asr | Austroasiatic | | | 6a · Vigorous |
| atmAta | atm | Austronesian | | | 8b · Nearly Extinct |
| aqpAtakapa | aqp | — | | | |
| amzAtampaya | amz | Australian Aboriginal languages | | | 10 · Extinct |
| tayAtayal | tay | Austronesian | | 80,000 | 5 · Developing |
| ateAtemble | ate | Trans–New Guinea | | | 8b · Nearly Extinct |
| aphAthpare | aph | Sino-Tibetan | | | 6b · Threatened |
| atkAtibahasa Ati | atk | Austronesian | | | 6b · Threatened |
| atjAtikamekwAtikamekw Nehiromowin | atj | — | | 6,160 | 5 · Developing |
| aqmAtohwaim | aqm | Trans–New Guinea | | | 6b · Threatened |
| atoAtong | ato | Niger–Congo | | | 6b · Threatened |
| aotAtong | aot | Sino-Tibetan | | | 7 · Shifting |
| atcAtsahuaca | atc | Pano-Tacanan | | 20 | |
| cchAtsamCawai | cch | — | | | 5 · Developing |
| atwAtsugewi | atw | — | | 200 | 9 · Dormant |
| pkrAttapady Kurumba | pkr | Dravidian | | | 6a · Vigorous |
| atiAttié | ati | Niger–Congo | | | 5 · Developing |
| avtAu | avt | Torricelli | | | 5 · Developing |
| kud'Auhelawa | kud | Austronesian | | 1,200 | 5 · Developing |
| aulAulua | aul | Austronesian | | 300 | 6a · Vigorous |
| auxAurá | aux | Tupian | | | 10 · Extinct |
| auhAushi | auh | Niger–Congo | | 95,200 | 6a · Vigorous |
| avsAushiri | avs | Saparo–Yawan | | | 10 · Extinct |
| asfAuslan | asf | — | | 10,100 | 5 · Developing |
| autAustral | aut | Austronesian | | 12,000 | 7 · Shifting |
| asqAustrian Sign LanguageÖsterreichische Gebärdensprache | asq | — | | | 5 · Developing |
| auvAuvergnatAuvernhat | auv | Indo-European | | 80,000 | Severely endangered |
| smfAuwe | smf | Border | | | 6b · Threatened |
| auuAuyebahasa Auye | auu | Trans–New Guinea | | | 5 · Developing |
| avvAvá-Canoeiro | avv | Tupian | | | 8b · Nearly Extinct |
| nhdAva Guarani | nhd | Tupian | | | 6b · Threatened |
| avaAvarавар мацI | ava | Northeast Caucasian | | 766,500 | 3 · Wider Communication |
| avnAvatime | avn | Niger–Congo | | | 5 · Developing |
| aveAvestan | ave | Indo-European | | | 10 · Extinct |
| aviAvikam | avi | Niger–Congo | | | 5 · Developing |
| avuAvokaya | avu | Nilo-Saharan | | | 5 · Developing |
| vwaAwa | vwa | Austroasiatic | | | 6b · Threatened |
| awbAwa | awb | — | | | 5 · Developing |
| kwiAwa PitKwaiker | kwi | Barbacoan | | 12,055 | 6b · Threatened |
| awkAwabakal | awk | Australian Aboriginal languages | | | 9 · Dormant |
| bcuAwad Bing | bcu | Austronesian | | | 4 · Educational |
| awaAwadhiअवधी | awa | Indo-European | | 22 m | 5 · Developing |
| awoAwak | awo | — | | 6,000 | 6a · Vigorous |
| aguAwakatekQa'yol | agu | Central American Indian languages | | 10,100 | 4 · Educational |
| ayaAwar | aya | Ramu–Lower Sepik | | | 7 · Shifting |
| awxAwara | awx | — | | | 6a · Vigorous |
| awhAwbonobahasa Awbono | awh | — | | | 6b · Threatened |
| bobAweer | bob | Afroasiatic | | | 6a · Vigorous |
| awrAwerabahasa Awera | awr | Lakes Plain | | | 7 · Shifting |
| aweAwetï | awe | Tupian | | 170 | 6b · Threatened |
| azoAwing | azo | Niger–Congo | | | 5 · Developing |
| auyAwiyaana | auy | Trans–New Guinea | | | 5 · Developing |
| aujAwjila | auj | Afroasiatic | | 3,000 | 8a · Moribund |
| awnAwngi | awn | Afroasiatic | | 490,000 | 4 · Educational |
| gwmAwngthim | gwm | Australian Aboriginal languages | | | |
| kmnAwtuw | kmn | Sepik | | | 6b · Threatened |
| yiuAwu Yi | yiu | — | | | 6b · Threatened |
| awwAwun | aww | Sepik | | | 6b · Threatened |
| auwAwyibahasa Awje | auw | Border | | 350 | 8a · Moribund |
| ahbAxamb | ahb | Austronesian | | | 6a · Vigorous |
| cpcAxininca | cpc | Southern Maipuran | | 4,000 | 6b · Threatened |
| aydAyabadhu | ayd | Australian Aboriginal languages | | | 10 · Extinct |
| quyAyacucho QuechuaChanka runasimi | quy | Quechua | | 918,200 | 3 · Wider Communication |