有效Hreflang Tag代碼及測試工具
Hreflang 語言代碼（2 個字母的 ISO-639-1 代碼）
| Language | 2-letter ISO Code |
| Abkhaz | ab |
| Afar | aa |
| Afrikaans | af |
| Akan | ak |
| Albanian | sq |
| Amharic | am |
| Arabic | ar |
| Aragonese | an |
| Armenian | hy |
| Assamese | as |
| Avaric | av |
| Avestan | ae |
| Aymara | ay |
| Azerbaijani | az |
| Bambara | bm |
| Bashkir | ba |
| Basque | eu |
| Belarusian | be |
| Bengali, Bangla | bn |
| Bihari | bh |
| Bislama | bi |
| Bosnian | bs |
| Breton | br |
| Bulgarian | bg |
| Burmese | my |
| Catalan, Valencian | ca |
| Chamorro | ch |
| Chechen | ce |
| Chichewa, Chewa, Nyanja | ny |
| Chinese | zh |
| Chuvash | cv |
| Cornish | kw |
| Corsican | co |
| Cree | cr |
| Croatian | hr |
| Czech | cs |
| Danish | da |
| Divehi, Dhivehi, Maldivian | dv |
| Dutch | nl |
| Dzongkha | dz |
| English | en |
| Esperanto | eo |
| Estonian | et |
| Ewe | ee |
| Faroese | fo |
| Fijian | fj |
| Finnish | fi |
| French | fr |
| Fula, Fulah, Pulaar, Pular | ff |
| Galician | gl |
| Georgian | ka |
| German | de |
| Greek (modern) | el |
| Guaraní | gn |
| Gujarati | gu |
| Haitian, Haitian Creole | ht |
| Hausa | ha |
| Hebrew (modern) | he |
| Herero | hz |
| Hindi | hi |
| Hiri Motu | ho |
| Hungarian | hu |
| Interlingua | ia |
| Indonesian | id |
| Interlingue | ie |
| Irish | ga |
| Igbo | ig |
| Inupiaq | ik |
| Ido | io |
| Icelandic | is |
| Italian | it |
| Inuktitut | iu |
| Japanese | ja |
| Javanese | jv |
| Kalaallisut, Greenlandic | kl |
| Kannada | kn |
| Kanuri | kr |
| Kashmiri | ks |
| Kazakh | kk |
| Khmer | km |
| Kikuyu, Gikuyu | ki |
| Kinyarwanda | rw |
| Kyrgyz | ky |
| Komi | kv |
| Kongo | kg |
| Korean | ko |
| Kurdish | ku |
| Kwanyama, Kuanyama | kj |
| Latin | la |
| Luxembourgish, Letzeburgesch | lb |
| Ganda | lg |
| Limburgish, Limburgan, Limburger | li |
| Lingala | ln |
| Lao | lo |
| Lithuanian | lt |
| Luba-Katanga | lu |
| Latvian | lv |
| Manx | gv |
| Macedonian | mk |
| Malagasy | mg |
| Malay | ms |
| Malayalam | ml |
| Maltese | mt |
| Māori | mi |
| Marathi (Marāṭhī) | mr |
| Marshallese | mh |
| Mongolian | mn |
| Nauru | na |
| Navajo, Navaho | nv |
| Northern Ndebele | nd |
| Nepali | ne |
| Ndonga | ng |
| Norwegian Bokmål | nb |
| Norwegian Nynorsk | nn |
| Norwegian | no |
| Nuosu | ii |
| Southern Ndebele | nr |
| Occitan | oc |
| Ojibwe, Ojibwa | oj |
| Old Church Slavonic, Church Slavonic, Old Bulgarian | cu |
| Oromo | om |
| Oriya | or |
| Ossetian, Ossetic | os |
| Panjabi, Punjabi | pa |
| Pāli | pi |
| Persian (Farsi) | fa |
| Polish | pl |
| Pashto, Pushto | ps |
| Portuguese | pt |
| Quechua | qu |
| Romansh | rm |
| Kirundi | rn |
| Romanian | ro |
| Russian | ru |
| Sanskrit (Saṁskṛta) | sa |
| Sardinian | sc |
| Sindhi | sd |
| Northern Sami | se |
| Samoan | sm |
| Sango | sg |
| Serbian | sr |
| Scottish Gaelic, Gaelic | gd |
| Shona | sn |
| Sinhala, Sinhalese | si |
| Slovak | sk |
| Slovene | sl |
| Somali | so |
| Southern Sotho | st |
| Spanish, Castilian | es |
| Sundanese | su |
| Swahili | sw |
| Swati | ss |
| Swedish | sv |
| Tamil | ta |
| Telugu | te |
| Tajik | tg |
| Thai | th |
| Tigrinya | ti |
| Tibetan Standard, Tibetan, Central | bo |
| Turkmen | tk |
| Tagalog | tl |
| Tswana | tn |
| Tonga (Tonga Islands) | to |
| Turkish | tr |
| Tsonga | ts |
| Tatar | tt |
| Twi | tw |
| Tahitian | ty |
| Uyghur, Uighur | ug |
| Ukrainian | uk |
| Urdu | ur |
| Uzbek | uz |
| Venda | ve |
| Vietnamese | vi |
| Volapük | vo |
| Walloon | wa |
| Welsh | cy |
| Wolof | wo |
| Western Frisian | fy |
| Xhosa | xh |
| Yiddish | yi |
| Yoruba | yo |
| Zhuang, Chuang | za |
| Zulu | zu |
Hreflang 區域代碼（2 個字母的 ISO-3166-1 代碼）
2 個字母的地區位於語言之後，是可選的。例如，「en -US 」 代表美國英語，「en -GB 」 代表英國英語。
| Country | 2-character ISO Code |
| Afghanistan | AF |
| Åland Islands | AX |
| Albania | AL |
| Algeria | DZ |
| American Samoa | AS |
| Andorra | AD |
| Angola | AO |
| Anguilla | AI |
| Antarctica | AQ |
| Antigua and Barbuda | AG |
| Argentina | AR |
| Armenia | AM |
| Aruba | AW |
| Australia | AU |
| Austria | AT |
| Azerbaijan | AZ |
| Bahamas | BS |
| Bahrain | BH |
| Bangladesh | BD |
| Barbados | BB |
| Belarus | BY |
| Belgium | BE |
| Belize | BZ |
| Benin | BJ |
| Bermuda | BM |
| Bhutan | BT |
| Bolivia, Plurinational State of | BO |
| Bonaire, Sint Eustatius and Saba | BQ |
| Bosnia and Herzegovina | BA |
| Botswana | BW |
| Bouvet Island | BV |
| Brazil | BR |
| British Indian Ocean Territory | IO |
| Brunei Darussalam | BN |
| Bulgaria | BG |
| Burkina Faso | BF |
| Burundi | BI |
| Cambodia | KH |
| Cameroon | CM |
| Canada | CA |
| Cabo Verde | CV |
| Cayman Islands | KY |
| Central African Republic | CF |
| Chad | TD |
| Chile | CL |
| China | CN |
| Christmas Island | CX |
| Cocos (Keeling) Islands | CC |
| Colombia | CO |
| Comoros | KM |
| Congo | CG |
| Congo, the Democratic Republic of the | CD |
| Cook Islands | CK |
| Costa Rica | CR |
| Côte d’Ivoire | CI |
| Croatia | HR |
| Cuba | CU |
| Curaçao | CW |
| Cyprus | CY |
| Czech Republic | CZ |
| Denmark | DK |
| Djibouti | DJ |
| Dominica | DM |
| Dominican Republic | DO |
| Ecuador | EC |
| Egypt | EG |
| El Salvador | SV |
| Equatorial Guinea | GQ |
| Eritrea | ER |
| Estonia | EE |
| Ethiopia | ET |
| Falkland Islands (Malvinas) | FK |
| Faroe Islands | FO |
| Fiji | FJ |
| Finland | FI |
| France | FR |
| French Guiana | GF |
| French Polynesia | PF |
| French Southern Territories | TF |
| Gabon | GA |
| Gambia | GM |
| Georgia | GE |
| Germany | DE |
| Ghana | GH |
| Gibraltar | GI |
| Greece | GR |
| Greenland | GL |
| Grenada | GD |
| Guadeloupe | GP |
| Guam | GU |
| Guatemala | GT |
| Guernsey | GG |
| Guinea | GN |
| Guinea-Bissau | GW |
| Guyana | GY |
| Haiti | HT |
| Heard Island and McDonald Islands | HM |
| Holy See (Vatican City State) | VA |
| Honduras | HN |
| Hong Kong | HK |
| Hungary | HU |
| Iceland | IS |
| India | IN |
| Indonesia | ID |
| Iran, Islamic Republic of | IR |
| Iraq | IQ |
| Ireland | IE |
| Isle of Man | IM |
| Israel | IL |
| Italy | IT |
| Jamaica | JM |
| Japan | JP |
| Jersey | JE |
| Jordan | JO |
| Kazakhstan | KZ |
| Kenya | KE |
| Kiribati | KI |
| Korea, Democratic People’s Republic of | KP |
| Korea, Republic of | KR |
| Kuwait | KW |
| Kyrgyzstan | KG |
| Lao People’s Democratic Republic | LA |
| Latvia | LV |
| Lebanon | LB |
| Lesotho | LS |
| Liberia | LR |
| Libya | LY |
| Liechtenstein | LI |
| Lithuania | LT |
| Luxembourg | LU |
| Macao | MO |
| Macedonia, the former Yugoslav Republic of | MK |
| Madagascar | MG |
| Malawi | MW |
| Malaysia | MY |
| Maldives | MV |
| Mali | ML |
| Malta | MT |
| Marshall Islands | MH |
| Martinique | MQ |
| Mauritania | MR |
| Mauritius | MU |
| Mayotte | YT |
| Mexico | MX |
| Micronesia, Federated States of | FM |
| Moldova, Republic of | MD |
| Monaco | MC |
| Mongolia | MN |
| Montenegro | ME |
| Montserrat | MS |
| Morocco | MA |
| Mozambique | MZ |
| Myanmar | MM |
| Namibia | NA |
| Nauru | NR |
| Nepal | NP |
| Netherlands | NL |
| New Caledonia | NC |
| New Zealand | NZ |
| Nicaragua | NI |
| Niger | NE |
| Nigeria | NG |
| Niue | NU |
| Norfolk Island | NF |
| Northern Mariana Islands | MP |
| Norway | NO |
| Oman | OM |
| Pakistan | PK |
| Palau | PW |
| Palestine, State of | PS |
| Panama | PA |
| Papua New Guinea | PG |
| Paraguay | PY |
| Peru | PE |
| Philippines | PH |
| Pitcairn | PN |
| Poland | PL |
| Portugal | PT |
| Puerto Rico | PR |
| Qatar | QA |
| Réunion | RE |
| Romania | RO |
| Russian Federation | RU |
| Rwanda | RW |
| Saint Barthélemy | BL |
| Saint Helena, Ascension and Tristan da Cunha | SH |
| Saint Kitts and Nevis | KN |
| Saint Lucia | LC |
| Saint Martin (French part) | MF |
| Saint Pierre and Miquelon | PM |
| Saint Vincent and the Grenadines | VC |
| Samoa | WS |
| San Marino | SM |
| Sao Tome and Principe | ST |
| Saudi Arabia | SA |
| Senegal | SN |
| Serbia | RS |
| Seychelles | SC |
| Sierra Leone | SL |
| Singapore | SG |
| Sint Maarten (Dutch part) | SX |
| Slovakia | SK |
| Slovenia | SI |
| Solomon Islands | SB |
| Somalia | SO |
| South Africa | ZA |
| South Georgia and the South Sandwich Islands | GS |
| South Sudan | SS |
| Spain | ES |
| Sri Lanka | LK |
| Sudan | SD |
| Suriname | SR |
| Svalbard and Jan Mayen | SJ |
| Swaziland | SZ |
| Sweden | SE |
| Switzerland | CH |
| Syrian Arab Republic | SY |
| Taiwan, Province of China | TW |
| Tajikistan | TJ |
| Tanzania, United Republic of | TZ |
| Thailand | TH |
| Timor-Leste | TL |
| Togo | TG |
| Tokelau | TK |
| Tonga | TO |
| Trinidad and Tobago | TT |
| Tunisia | TN |
| Turkey | TR |
| Turkmenistan | TM |
| Turks and Caicos Islands | TC |
| Tuvalu | TV |
| Uganda | UG |
| Ukraine | UA |
| United Arab Emirates | AE |
| United Kingdom | GB |
| United States | US |
| United States Minor Outlying Islands | UM |
| Uruguay | UY |
| Uzbekistan | UZ |
| Vanuatu | VU |
| Venezuela, Bolivarian Republic of | VE |
| Viet Nam | VN |
| Virgin Islands, British | VG |
| Virgin Islands, U.S. | VI |
| Wallis and Futuna | WF |
| Western Sahara | EH |
| Yemen | YE |
| Zambia | ZM |
| Zimbabwe | ZW |
腳本程式碼
4 個字母的腳本代碼（ISO 15924 代碼），這些代碼也可用於 hreflang 標記。例如，帶有國家代碼的“ sr-hu-Latn ”或不帶國家代碼的“ sr-Latn ”。
| Script | 4-letter Script Code |
| Adlam | Adlm |
| Afaka | Afak |
| Caucasian Albanian | Aghb |
| Ahom, Tai Ahom | Ahom |
| Arabic | Arab |
| Arabic (Nastaliq variant) | Aran |
| Imperial Aramaic | Armi |
| Armenian | Armn |
| Avestan | Avst |
| Balinese | Bali |
| Bamum | Bamu |
| Bassa Vah | Bass |
| Batak | Batk |
| Bengali (Bangla) | Beng |
| Bhaiksuki | Bhks |
| Blissymbols | Blis |
| Bopomofo | Bopo |
| Brahmi | Brah |
| Braille | Brai |
| Buginese | Bugi |
| Buhid | Buhd |
| Chakma | Cakm |
| Unified Canadian Aboriginal Syllabics | Cans |
| Carian | Cari |
| Cham | Cham |
| Cherokee | Cher |
| Cirth | Cirt |
| Coptic | Copt |
| Cypro-Minoan | Cpmn |
| Cypriot syllabary | Cprt |
| Cyrillic | Cyrl |
| Cyrillic (Old Church Slavonic variant) | Cyrs |
| Devanagari (Nagari) | Deva |
| Dogra | Dogr |
| Deseret (Mormon) | Dsrt |
| Duployan shorthand, Duployan stenography | Dupl |
| Egyptian demotic | Egyd |
| Egyptian hieratic | Egyh |
| Egyptian hieroglyphs | Egyp |
| Elbasan | Elba |
| Ethiopic (Geʻez) | Ethi |
| Khutsuri (Asomtavruli and Nuskhuri) | Geok |
| Georgian (Mkhedruli and Mtavruli) | Geor |
| Glagolitic | Glag |
| Gunjala Gondi | Gong |
| Masaram Gondi | Gonm |
| Gothic | Goth |
| Grantha | Gran |
| Greek | Grek |
| Gujarati | Gujr |
| Gurmukhi | Guru |
| Han with Bopomofo (alias for Han + Bopomofo) | Hanb |
| Hangul (Hangŭl, Hangeul) | Hang |
| Han (Hanzi, Kanji, Hanja) | Hani |
| Hanunoo (Hanunóo) | Hano |
| Han (Simplified variant) | Hans |
| Han (Traditional variant) | Hant |
| Hatran | Hatr |
| Hebrew | Hebr |
| Hiragana | Hira |
| Anatolian Hieroglyphs (Luwian Hieroglyphs, Hittite Hieroglyphs) | Hluw |
| Pahawh Hmong | Hmng |
| Nyiakeng Puachue Hmong | Hmnp |
| Japanese syllabaries (alias for Hiragana + Katakana) | Hrkt |
| Old Hungarian (Hungarian Runic) | Hung |
| Indus (Harappan) | Inds |
| Old Italic (Etruscan, Oscan, etc.) | Ital |
| Jamo (alias for Jamo subset of Hangul) | Jamo |
| Javanese | Java |
| Japanese (alias for Han + Hiragana + Katakana) | Jpan |
| Jurchen | Jurc |
| Kayah Li | Kali |
| Katakana | Kana |
| Kharoshthi | Khar |
| Khmer | Khmr |
| Khojki | Khoj |
| Khitan large script | Kitl |
| Khitan small script | Kits |
| Kannada | Knda |
| Korean (alias for Hangul + Han) | Kore |
| Kpelle | Kpel |
| Kaithi | Kthi |
| Tai Tham (Lanna) | Lana |
| Lao | Laoo |
| Latin (Fraktur variant) | Latf |
| Latin (Gaelic variant) | Latg |
| Latin | Latn |
| Leke | Leke |
| Lepcha (Róng) | Lepc |
| Limbu | Limb |
| Linear A | Lina |
| Linear B | Linb |
| Lisu (Fraser) | Lisu |
| Loma | Loma |
| Lycian | Lyci |
| Lydian | Lydi |
| Mahajani | Mahj |
| Makasar | Maka |
| Mandaic, Mandaean | Mand |
| Manichaean | Mani |
| Marchen | Marc |
| Mayan hieroglyphs | Maya |
| Medefaidrin (Oberi Okaime, Oberi Ɔkaimɛ) | Medf |
| Mende Kikakui | Mend |
| Meroitic Cursive | Merc |
| Meroitic Hieroglyphs | Mero |
| Malayalam | Mlym |
| Modi, Moḍī | Modi |
| Mongolian | Mong |
| Moon (Moon code, Moon script, Moon type) | Moon |
| Mro, Mru | Mroo |
| Meitei Mayek (Meithei, Meetei) | Mtei |
| Multani | Mult |
| Myanmar (Burmese) | Mymr |
| Old North Arabian (Ancient North Arabian) | Narb |
| Nabataean | Nbat |
| Newa, Newar, Newari, Nepāla lipi | Newa |
| Naxi Dongba (na²¹ɕi³³ to³³ba²¹, Nakhi Tomba) | Nkdb |
| Naxi Geba (na²¹ɕi³³ gʌ²¹ba²¹, ‘Na-‘Khi ²Ggŏ-¹baw, Nakhi Geba) | Nkgb |
| N’Ko | Nkoo |
| Nüshu | Nshu |
| Ogham | Ogam |
| Ol Chiki (Ol Cemet’, Ol, Santali) | Olck |
| Old Turkic, Orkhon Runic | Orkh |
| Oriya (Odia) | Orya |
| Osage | Osge |
| Osmanya | Osma |
| Palmyrene | Palm |
| Pau Cin Hau | Pauc |
| Old Permic | Perm |
| Phags-pa | Phag |
| Inscriptional Pahlavi | Phli |
| Psalter Pahlavi | Phlp |
| Book Pahlavi | Phlv |
| Phoenician | Phnx |
| Klingon (KLI pIqaD) | Piqd |
| Miao (Pollard) | Plrd |
| Inscriptional Parthian | Prti |
| Reserved for private use (start) | Qaaa |
| Reserved for private use (end) | Qabx |
| Rejang (Redjang, Kaganga) | Rjng |
| Rongorongo | Roro |
| Runic | Runr |
| Samaritan | Samr |
| Sarati | Sara |
| Old South Arabian | Sarb |
| Saurashtra | Saur |
| SignWriting | Sgnw |
| Shavian (Shaw) | Shaw |
| Sharada, Śāradā | Shrd |
| Shuishu | Shui |
| Siddham, Siddhaṃ, Siddhamātṛkā | Sidd |
| Khudawadi, Sindhi | Sind |
| Sinhala | Sinh |
| Sora Sompeng | Sora |
| Soyombo | Soyo |
| Sundanese | Sund |
| Syloti Nagri | Sylo |
| Syriac | Syrc |
| Syriac (Estrangelo variant) | Syre |
| Syriac (Western variant) | Syrj |
| Syriac (Eastern variant) | Syrn |
| Tagbanwa | Tagb |
| Takri, Ṭākrī, Ṭāṅkrī | Takr |
| Tai Le | Tale |
| New Tai Lue | Talu |
| Tamil | Taml |
| Tangut | Tang |
| Tai Viet | Tavt |
| Telugu | Telu |
| Tengwar | Teng |
| Tifinagh (Berber) | Tfng |
| Tagalog (Baybayin, Alibata) | Tglg |
| Thaana | Thaa |
| Thai | Thai |
| Tibetan | Tibt |
| Tirhuta | Tirh |
| Ugaritic | Ugar |
| Vai | Vaii |
| Visible Speech | Visp |
| Warang Citi (Varang Kshiti) | Wara |
| Wancho | Wcho |
| Woleai | Wole |
| Old Persian | Xpeo |
| Cuneiform, Sumero-Akkadian | Xsux |
| Yi | Yiii |
| Zanabazar Square (Zanabazarin Dörböljin Useg, Xewtee Dörböljin Bicig, Horizontal Square Script) | Zanb |
| Code for inherited script | Zinh |
| Mathematical notation | Zmth |
| Symbols (Emoji variant) | Zsye |
| Symbols | Zsym |
| Code for unwritten documents | Zxxx |
| Code for undetermined script | Zyyy |
| Code for uncoded script | Zzzz |
hreflang程式碼測試工具：https://app.hreflang.org/
使用此工具可偵測已新增的hreflang程式碼是否正確。
