ISO 639는 언어 분류를 위해 사용되는 표준화된 명명법이다. 각 언어는 2글자(639-1) 및 3글자(639-2, 639-3)로 할당된다.
| 어족 | ISO 언어 이름 | 네이티브 이름 | 639-1 | 639-2/T | 639-2/B | 639-3 |
| Northwest Caucasian | Abkhazian | аҧсуа бызшәа, аҧсшәа | ab | abk | abk | abk |
| Afro-Asiatic | Afar | Afaraf | aa | aar | aar | aar |
| Indo-European | Afrikaans | Afrikaans | af | afr | afr | afr |
| Niger–Congo | Akan | Akan | ak | aka | aka | aka + 2 |
| Indo-European | Albanian | Shqip | sq | sqi | alb | sqi + 4 |
| Afro-Asiatic | Amharic | አማርኛ | am | amh | amh | amh |
| Afro-Asiatic | Arabic |
العربية |
ar | ara | ara | ara + 30 |
| Indo-European | Aragonese | aragonés | an | arg | arg | arg |
| Indo-European | Armenian | Հայերեն | hy | hye | arm | hye |
| Indo-European | Assamese | অসমীয়া | as | asm | asm | asm |
| Northeast Caucasian | Avaric | авар мацӀ, магӀарул мацӀ | av | ava | ava | ava |
| Indo-European | Avestan | avesta | ae | ave | ave | ave |
| Aymaran | Aymara | aymar aru | ay | aym | aym | aym + 2 |
| Turkic | Azerbaijani | azərbaycan dili | az | aze | aze | aze + 2 |
| Niger–Congo | Bambara | bamanankan | bm | bam | bam | bam |
| Turkic | Bashkir | башҡорт теле | ba | bak | bak | bak |
| 고립어 (비교언어학) | Basque | euskara, euskera | eu | eus | baq | eus |
| Indo-European | Belarusian | беларуская мова | be | bel | bel | bel |
| Indo-European | Bengali | বাংলা | bn | ben | ben | ben |
| Indo-European | 비하르어 | भोजपुरी | bh | bih | bih | |
| Creole | Bislama | Bislama | bi | bis | bis | bis |
| Indo-European | Bosnian | bosanski jezik | bs | bos | bos | bos |
| Indo-European | Breton | brezhoneg | br | bre | bre | bre |
| Indo-European | Bulgarian | български език | bg | bul | bul | bul |
| Sino-Tibetan | Burmese | ဗမာစာ | my | mya | bur | mya |
| Indo-European | Catalan, Valencian | català, valencià | ca | cat | cat | cat |
| Austronesian | Chamorro | Chamoru | ch | cha | cha | cha |
| Northeast Caucasian | Chechen | нохчийн мотт | ce | che | che | che |
| Niger–Congo | Chichewa, Chewa, Nyanja | chiCheŵa, chinyanja | ny | nya | nya | nya |
| Sino-Tibetan | Chinese | 中文 (Zhōngwén), 汉语, 漢語 | zh | zho | chi | zho + 14 |
| Turkic | Chuvash | чӑваш чӗлхи | cv | chv | chv | chv |
| Indo-European | Cornish | Kernewek | kw | cor | cor | cor |
| Indo-European | Corsican | corsu, lingua corsa | co | cos | cos | cos |
| Algonquian | Cree | ᓀᐦᐃᔭᐍᐏᐣ | cr | cre | cre | cre + 6 |
| Indo-European | Croatian | hrvatski jezik | hr | hrv | hrv | hrv |
| Indo-European | Czech | čeština, český jazyk | cs | ces | cze | ces |
| Indo-European | Danish | dansk | da | dan | dan | dan |
| Indo-European | Divehi, Dhivehi, Maldivian |
ދިވެހި |
dv | div | div | div |
| Indo-European | Dutch, Flemish | Nederlands, Vlaams | nl | nld | dut | nld |
| Sino-Tibetan | Dzongkha | རྫོང་ཁ | dz | dzo | dzo | dzo |
| Indo-European | English | English | en | eng | eng | eng |
| Constructed | 에스페란토 | Esperanto | eo | epo | epo | epo |
| Uralic | Estonian | eesti, eesti keel | et | est | est | est + 2 |
| Niger–Congo | Ewe | Eʋegbe | ee | ewe | ewe | ewe |
| Indo-European | Faroese | føroyskt | fo | fao | fao | fao |
| Austronesian | Fijian | vosa Vakaviti | fj | fij | fij | fij |
| Uralic | Finnish | suomi, suomen kieli | fi | fin | fin | fin |
| Indo-European | French | français, langue française | fr | fra | fre | fra |
| Niger–Congo | Fulah | Fulfulde, Pulaar, Pular | ff | ful | ful | ful + 9 |
| Indo-European | Galician | Galego | gl | glg | glg | glg |
| Kartvelian | Georgian | ქართული | ka | kat | geo | kat |
| Indo-European | German | Deutsch | de | deu | ger | deu |
| Indo-European | Greek, Modern (1453-) | ελληνικά | el | ell | gre | ell |
| Tupian | Guarani | Avañe'ẽ | gn | grn | grn | grn + 5 |
| Indo-European | Gujarati | ગુજરાતી | gu | guj | guj | guj |
| Creole | Haitian, Haitian Creole | Kreyòl ayisyen | ht | hat | hat | hat |
| Afro-Asiatic | Hausa |
(Hausa) هَوُسَ |
ha | hau | hau | hau |
| Afro-Asiatic | Hebrew |
עברית |
he | heb | heb | heb |
| Niger–Congo | Herero | Otjiherero | hz | her | her | her |
| Indo-European | 힌디어 | हिन्दी, हिंदी | hi | hin | hin | hin |
| Austronesian | Hiri Motu | Hiri Motu | ho | hmo | hmo | hmo |
| Uralic | Hungarian | magyar | hu | hun | hun | hun |
| Constructed | 인테르링구아 (International Auxiliary Language Association) | Interlingua | ia | ina | ina | ina |
| Austronesian | Indonesian | Bahasa Indonesia | id | ind | ind | ind |
| Constructed | Interlingue, Occidental | Originally called Occidental; then Interlingue after WWII | ie | ile | ile | ile |
| Indo-European | Irish | Gaeilge | ga | gle | gle | gle |
| Niger–Congo | Igbo | Asụsụ Igbo | ig | ibo | ibo | ibo |
| Eskimo–Aleut | Inupiaq | Iñupiaq, Iñupiatun | ik | ipk | ipk | ipk + 2 |
| Constructed | Ido | Ido | io | ido | ido | ido |
| Indo-European | Icelandic | Íslenska | is | isl | ice | isl |
| Indo-European | Italian | Italiano | it | ita | ita | ita |
| Eskimo–Aleut | 이누크티투트어 | ᐃᓄᒃᑎᑐᑦ | iu | iku | iku | iku + 2 |
| 일본어족 | Japanese | 日本語 (にほんご) | ja | jpn | jpn | jpn |
| Austronesian | Javanese | ꦧꦱꦗꦮ, Basa Jawa | jv | jav | jav | jav |
| Eskimo–Aleut | Kalaallisut, Greenlandic | kalaallisut, kalaallit oqaasii | kl | kal | kal | kal |
| Dravidian | Kannada | ಕನ್ನಡ | kn | kan | kan | kan |
| Nilo-Saharan | Kanuri | Kanuri | kr | kau | kau | kau + 3 |
| Indo-European | Kashmiri | कश्मीरी, كشميري | ks | kas | kas | kas |
| Turkic | Kazakh | қазақ тілі | kk | kaz | kaz | kaz |
| Austroasiatic | Central Khmer | ខ្មែរ, ខេមរភាសា, ភាសាខ្មែរ | km | khm | khm | khm |
| Niger–Congo | Kikuyu, Gikuyu | Gĩkũyũ | ki | kik | kik | kik |
| Niger–Congo | 키냐르완다어 | Ikinyarwanda | rw | kin | kin | kin |
| Turkic | Kirghiz, Kyrgyz | Кыргызча, Кыргыз тили | ky | kir | kir | kir |
| Uralic | Komi | коми кыв | kv | kom | kom | kom + 2 |
| Niger–Congo | Kongo | Kikongo | kg | kon | kon | kon + 3 |
| 한국어족 | Korean | 한국어 | ko | kor | kor | kor |
| Indo-European | Kurdish | Kurdî, کوردی | ku | kur | kur | kur + 3 |
| Niger–Congo | Kuanyama, Kwanyama | Kuanyama | kj | kua | kua | kua |
| Indo-European | 라틴어 | latine, lingua latina | la | lat | lat | lat |
| Indo-European | Luxembourgish, Letzeburgesch | Lëtzebuergesch | lb | ltz | ltz | ltz |
| Niger–Congo | Ganda | Luganda | lg | lug | lug | lug |
| Indo-European | Limburgan, Limburger, Limburgish | Limburgs | li | lim | lim | lim |
| Niger–Congo | Lingala | Lingála | ln | lin | lin | lin |
| Tai–Kadai | Lao | ພາສາລາວ | lo | lao | lao | lao |
| Indo-European | Lithuanian | lietuvių kalba | lt | lit | lit | lit |
| Niger–Congo | Luba-Katanga | Kiluba | lu | lub | lub | lub |
| Indo-European | Latvian | latviešu valoda | lv | lav | lav | lav + 2 |
| Indo-European | Manx | Gaelg, Gailck | gv | glv | glv | glv |
| Indo-European | Macedonian | македонски јазик | mk | mkd | mac | mkd |
| Austronesian | Malagasy | fiteny malagasy | mg | mlg | mlg | mlg + 11 |
| Austronesian | Malay | Bahasa Melayu, بهاس ملايو | ms | msa | may | msa + 36 |
| Dravidian | Malayalam | മലയാളം | ml | mal | mal | mal |
| Afro-Asiatic | Maltese | Malti | mt | mlt | mlt | mlt |
| Austronesian | Maori | te reo Māori | mi | mri | mao | mri |
| Indo-European | Marathi | मराठी | mr | mar | mar | mar |
| Austronesian | Marshallese | Kajin M̧ajeļ | mh | mah | mah | mah |
| Mongolic | Mongolian | Монгол хэл | mn | mon | mon | mon + 2 |
| Austronesian | Nauru | Dorerin Naoero | na | nau | nau | nau |
| Dené–Yeniseian | Navajo, Navaho | Diné bizaad | nv | nav | nav | nav |
| Niger–Congo | North Ndebele | isiNdebele | nd | nde | nde | nde |
| Indo-European | Nepali | नेपाली | ne | nep | nep | nep + 2 |
| Niger–Congo | Ndonga | Owambo | ng | ndo | ndo | ndo |
| Indo-European | Norwegian Bokmål | Norsk Bokmål | nb | nob | nob | nob |
| Indo-European | Norwegian Nynorsk | Norsk Nynorsk | nn | nno | nno | nno |
| Indo-European | Norwegian | Norsk | no | nor | nor | nor + 2 |
| Sino-Tibetan | Sichuan Yi, Nuosu | ꆈꌠ꒿ Nuosuhxop | ii | iii | iii | iii |
| Niger–Congo | South Ndebele | isiNdebele | nr | nbl | nbl | nbl |
| Indo-European | Occitan | occitan, lenga d'òc | oc | oci | oci | oci |
| Algonquian | Ojibwa | ᐊᓂᔑᓈᐯᒧᐎᓐ | oj | oji | oji | oji + 7 |
| Indo-European | Church Slavic, Old Slavonic, Church Slavonic, Old Bulgarian, Old Church Slavonic | ѩзыкъ словѣньскъ | cu | chu | chu | chu |
| Afro-Asiatic | Oromo | Afaan Oromoo | om | orm | orm | orm + 4 |
| Indo-European | Oriya | ଓଡ଼ିଆ | or | ori | ori | ori + 2 |
| Indo-European | Ossetian, Ossetic | ирон æвзаг | os | oss | oss | oss |
| Indo-European | Panjabi, Punjabi | ਪੰਜਾਬੀ | pa | pan | pan | pan |
| Indo-European | Pali | पाऴि | pi | pli | pli | pli |
| Indo-European | Persian |
فارسی |
fa | fas | per | fas + 2 |
| Indo-European | Polish | język polski, polszczyzna | pl | pol | pol | pol |
| Indo-European | Pashto, Pushto |
پښتو |
ps | pus | pus | pus + 3 |
| Indo-European | Portuguese | Português | pt | por | por | por |
| Quechuan | Quechua | Runa Simi, Kichwa | qu | que | que | que + 43 |
| Indo-European | Romansh | Rumantsch Grischun | rm | roh | roh | roh |
| Niger–Congo | Rundi | Ikirundi | rn | run | run | run |
| Indo-European | Romanian, Moldavian, Moldovan | Română | ro | ron | rum | ron |
| Indo-European | Russian | русский | ru | rus | rus | rus |
| Indo-European | 산스크리트어 | संस्कृतम् | sa | san | san | san |
| Indo-European | Sardinian | sardu | sc | srd | srd | srd + 4 |
| Indo-European | Sindhi | सिन्धी, سنڌي، سندھی | sd | snd | snd | snd |
| Uralic | 북부 사미어 | Davvisámegiella | se | sme | sme | sme |
| Austronesian | Samoan | gagana fa'a Samoa | sm | smo | smo | smo |
| Creole | Sango | yângâ tî sängö | sg | sag | sag | sag |
| Indo-European | Serbian | српски језик | sr | srp | srp | srp |
| Indo-European | Gaelic, Scottish Gaelic | Gàidhlig | gd | gla | gla | gla |
| Niger–Congo | Shona | chiShona | sn | sna | sna | sna |
| Indo-European | Sinhala, Sinhalese | සිංහල | si | sin | sin | sin |
| Indo-European | Slovak | Slovenčina, Slovenský Jazyk | sk | slk | slo | slk |
| Indo-European | Slovenian | Slovenski Jezik, Slovenščina | sl | slv | slv | slv |
| Afro-Asiatic | Somali | Soomaaliga, af Soomaali | so | som | som | som |
| Niger–Congo | Southern Sotho | Sesotho | st | sot | sot | sot |
| Indo-European | Spanish, Castilian | Español | es | spa | spa | spa |
| Austronesian | Sundanese | Basa Sunda | su | sun | sun | sun |
| Niger–Congo | Swahili | Kiswahili | sw | swa | swa | swa + 2 |
| Niger–Congo | Swati | SiSwati | ss | ssw | ssw | ssw |
| Indo-European | Swedish | Svenska | sv | swe | swe | swe |
| Dravidian | Tamil | தமிழ் | ta | tam | tam | tam |
| Dravidian | Telugu | తెలుగు | te | tel | tel | tel |
| Indo-European | Tajik | тоҷикӣ, toçikī, تاجیکی | tg | tgk | tgk | tgk |
| Tai–Kadai | Thai | ไทย | th | tha | tha | tha |
| Afro-Asiatic | Tigrinya | ትግርኛ | ti | tir | tir | tir |
| Sino-Tibetan | Tibetan | བོད་ཡིག | bo | bod | tib | bod |
| Turkic | Turkmen | Türkmen, Түркмен | tk | tuk | tuk | tuk |
| Austronesian | Tagalog | Wikang Tagalog | tl | tgl | tgl | tgl |
| Niger–Congo | Tswana | Setswana | tn | tsn | tsn | tsn |
| Austronesian | Tonga (Tonga Islands) | Faka Tonga | to | ton | ton | ton |
| Turkic | Turkish | Türkçe | tr | tur | tur | tur |
| Niger–Congo | Tsonga | Xitsonga | ts | tso | tso | tso |
| Turkic | Tatar | татар теле, tatar tele | tt | tat | tat | tat |
| Niger–Congo | Twi | Twi | tw | twi | twi | twi |
| Austronesian | Tahitian | Reo Tahiti | ty | tah | tah | tah |
| Turkic | Uighur, Uyghur | ئۇيغۇرچە, Uyghurche | ug | uig | uig | uig |
| Indo-European | Ukrainian | Українська | uk | ukr | ukr | ukr |
| Indo-European | 우르두어 |
اردو |
ur | urd | urd | urd |
| Turkic | Uzbek | Oʻzbek, Ўзбек, أۇزبېك | uz | uzb | uzb | uzb + 2 |
| Niger–Congo | Venda | Tshivenḓa | ve | ven | ven | ven |
| Austroasiatic | Vietnamese | Tiếng Việt | vi | vie | vie | vie |
| Constructed | 볼라퓌크 | Volapük | vo | vol | vol | vol |
| Indo-European | Walloon | Walon | wa | wln | wln | wln |
| Indo-European | Welsh | Cymraeg | cy | cym | wel | cym |
| Niger–Congo | Wolof | Wollof | wo | wol | wol | wol |
| Indo-European | Western Frisian | Frysk | fy | fry | fry | fry |
| Niger–Congo | Xhosa | isiXhosa | xh | xho | xho | xho |
| Indo-European | Yiddish |
ייִדיש |
yi | yid | yid | yid + 2 |
| Niger–Congo | Yoruba | Yorùbá | yo | yor | yor | yor |
| Tai–Kadai | Zhuang, Chuang | Saɯ cueŋƅ, Saw cuengh | za | zha | zha | zha + 16 |
| Niger–Congo | Zulu | isiZulu | zu | zul | zul | zul |
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