| Code | Country | Code | Country | Code | Country |
|---|---|---|---|---|---|
| aa | Afar | fy | Frisian | lv | Latvian |
| ab | Abkhazian | ga | Irish | mg | Malagasy |
| af | Afrikaans | gd | Scots Gaelic | mi | Maori |
| am | Amharic | gl | Galician | mk | Macedonian |
| ar | Arabic | gn | Guarani | ml | Malayalam |
| as | Assamese | gu | Gujarati | mn | Mongolian |
| ay | Aymara | ha | Hausa | mo | Moldavian |
| az | Azerbaijani | he | Hebrew (formerly iw) | mr | Marathi |
| ba | Bashkir | hi | Hindi | ms | Malay |
| be | Byelorussian | hr | Croatian | mt | Maltese |
| bg | Bulgarian | hu | Hungarian | my | Burmese |
| bh | Bihari | hy | Armenian | na | Nauru |
| bi | Bislama | ia | Interlingua | ne | Nepali |
| bn | Bengali; Bangla | id | Indonesian (formerly in) | nl | Dutch |
| bo | Tibetan | ie | Interlingue | no | Norwegian |
| br | Breton | ik | Inupiak | oc | Occitan |
| ca | Catalan | is | Icelandic | om | (Afan) Oromo |
| co | Corsican | it | Italian | or | Oriya |
| cs | Czech | iu | Inuktitut | pa | Punjabi |
| cy | Welsh | ja | Japanese | pl | Polish |
| da | Danish | jw | Javanese | ps | Pashto, Pushto |
| de | German | ka | Georgian | pt | Portuguese |
| dz | Bhutani | kk | Kazakh | qu | Quechua |
| el | Greek | kl | Greenlandic | rm | Rhaeto-Romance |
| en | English | km | Cambodian | rn | Kirundi |
| eo | Esperanto | kn | Kannada | ro | Romanian |
| es | Spanish | ko | Korean | ru | Russian |
| et | Estonian | ks | Kashmiri | rm | Kinyarwanda |
| eu | Basque | ku | Kurdish | sa | Sanskrit |
| fa | Persian | ky | Kirghiz | sd | Sindhi |
| fi | Finnish | la | Latin | sg | Sangho |
| fj | Fiji | lm | Lingala | sh | Serbo-Croatian |
| fo | Faroese | lo | Laothian | si | Sinhalese |
| fr | French | lt | Lithuanian | sk | Slovak |
| sl | Slovenian | tg | Tajik | uk | Ukrainian |
| sm | Samoan | th | Thai | ur | Urdu |
| sn | Shona | ti | Tigrinya | uz | Uzbek |
| so | Somali | tk | Turkmen | vi | Vietnamese |
| sq | Albanian | tl | Tagalog | vo | Volapuk |
| sr | Serbian | tn | Setswana | wo | Wolof |
| ss | Siswati | to | Tonga | xh | Xhosa |
| st | Sesotho | tr | Turkish | yi | Yiddish (formerly ji) |
| su | Sundanese | ts | Tsonga | yo | Yoruba |
| sv | Swedish | tt | Tatar | za | Zhuang |
| sw | Swahili | tw | Twi | zh | Chinese |
| ta | Tamil | ug | Uighur | zu | Zulu |
| te | Telugu | ||||
Adapted from Niederst, Jennifer, Appendix C, Web Design in a Nutshell, 2nd Edition, (O'Reilly, 2001), available at http://www.oreilly.com/catalog/wdnut2/.
Refer to the W3C Internationalization Activity www.w3.org/International/