- The HTML lang attribute can be used to declare the language of a Web page or a portion of a Web page. This is meant to assist search engines and browsers.
- According to the W3C recommendation you should declare the primary language for each Web page with the lang attribute inside the <html> tag, like this:
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<html lang="en"> ... </html>
- In XHTML, the language is declared inside the <html> tag as follows:
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<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en"> ... </html>
- ISO 639-1 defines abbreviations for languages. In HTML and XHTML they can be used in the lang and xml:lang attributes.
Language ISO Code Abkhazian ab Afar aa Afrikaans af Albanian sq Amharic am Arabic ar Armenian hy Assamese as Aymara ay Azerbaijani az Bashkir ba Basque eu Bengali (Bangla) bn Bhutani dz Bihari bh Bislama bi Breton br Bulgarian bg Burmese my Byelorussian (Belarusian) be Cambodian km Catalan ca Cherokee Chewa Chinese (Simplified) zh Chinese (Traditional) zh Corsican co Croatian hr Czech cs Danish da Divehi Dutch nl Edo English en Esperanto eo Estonian et Faeroese fo Farsi fa Fiji fj Finnish fi Flemish French fr Frisian fy Fulfulde Galician gl Gaelic (Scottish) gd Gaelic (Manx) gv Georgian ka German de Greek el Greenlandic kl Guarani gn Gujarati gu Hausa ha Hawaiian Hebrew he, iw Hindi hi Hungarian hu Ibibio Icelandic is Igbo Indonesian id, in Interlingua ia Interlingue ie Inuktitut iu Inupiak ik Irish ga Italian it Japanese ja Javanese jv Kannada kn Kanuri Kashmiri ks Kazakh kk Kinyarwanda (Ruanda) rw Kirghiz ky Kirundi (Rundi) rn Konkani Korean ko Kurdish ku Laothian lo Latin la Latvian (Lettish) lv Limburgish ( Limburger) li Lingala ln Lithuanian lt Macedonian mk Malagasy mg Malay ms Malayalam ml Maltese mt Maori mi Marathi mr Moldavian mo Mongolian mn Nauru na Nepali ne Norwegian no Occitan oc Oriya or Oromo (Afan, Galla) om Papiamentu Pashto (Pushto) ps Polish pl Portuguese pt Punjabi pa Quechua qu Rhaeto-Romance rm Romanian ro Russian ru Sami (Lappish) Samoan sm Sangro sg Sanskrit sa Serbian sr Serbo-Croatian sh Sesotho st Setswana tn Shona sn Sindhi sd Sinhalese si Siswati ss Slovak sk Slovenian sl Somali so Spanish es Sundanese su Swahili (Kiswahili) sw Swedish sv Syriac Tagalog tl Tajik tg Tamazight Tamil ta Tatar tt Telugu te Thai th Tibetan bo Tigrinya ti Tonga to Tsonga ts Turkish tr Turkmen tk Twi tw Uighur ug Ukrainian uk Urdu ur Uzbek uz Venda Vietnamese vi VolapГјk vo Welsh cy Wolof wo Xhosa xh Yi Yiddish yi, ji Yoruba yo Zulu zu


