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最近需要给账户标注语言实现多国语言推送的问题。上去先来一波，Chinese， English，顿时感觉这里哪里有点不对。平时看到的标注应该是zh_CN, en_US 之类的，上面的写法肯定太土，需要学习一下，学习之后发现语言是有专门的ISO标准的 ISO-639。 特此记录一下。
上述格式即为
(ISO-639 Language Code)_(ISO-3166 Country Codes)
小写 大写
zh_CN (中文 中国)
zh_TW (中文 台湾地区)附上部分ISO639 语言标准表及ISO-3166 地区标准表
ISO639 语言标准表：
| Language | ISO-639 Language Code |
|---|---|
| Albanian | sq |
| Amharic | am |
| Arabic | ar |
| Afar | aa |
| Armenian | hy |
| Aymara | ay |
| Assamese | as |
| Azerbaijani | az |
| Bashkir | ba |
| Basque | eu |
| Bengali (Bangla) | bn |
| Afrikaans | af |
| Bhutani | dz |
| Bihari | bh |
| Bislama | bi |
| Breton | br |
| Bulgarian | bg |
| Burmese | my |
| Byelorussian (Belarusian) | be |
| Cambodian | km |
| Catalan | ca |
| Chinese (Simplified) | zh |
| Chinese (Traditional) | zh |
| Corsican | co |
| Croatian | hr |
| Czech | cs |
| Danish | da |
| Dutch | nl |
| Esperanto | eo |
| English | en |
| Estonian | et |
| Faeroese | fo |
| Farsi | fa |
| Fiji | fj |
| Finnish | fi |
| Frisian | fy |
| Galician | gl |
| Gaelic (Scottish) | gd |
| Gaelic (Manx) | gv |
| Georgian | ka |
| Greek | el |
| German | de |
| Greenlandic | kl |
| Gujarati | gu |
| Hausa | ha |
| Hebrew | he |
| French | fr |
| Guarani | gn |
| Hindi | hi |
| Hungarian | hu |
| Icelandic | is |
| Indonesian | id |
| Interlingua | ia |
| Inuktitut | iu |
| Interlingue | ie |
| Inupiak | ik |
| Irish | ga |
| Italian | it |
| Japanese | ja |
| Javanese | ja |
| Kannada | kn |
| Kashmiri | ks |
| Kinyarwanda (Ruanda) | rw |
| Kirundi (Rundi) | rn |
| Kirghiz | ky |
| Korean | ko |
| Kurdish | ku |
| Laothian | lo |
| Latin | la |
| Latvian (Lettish) | lv |
| Limburgish ( | Limburger) |
| 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) |
| Pashto (Pushto) | ps |
| Polish | pl |
| Portuguese | pt |
| Punjabi | pa |
| Quechua | qu |
| Rhaeto-Romance | rm |
| Romanian | ro |
| Russian | ru |
| 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 |
| Tagalog | tl |
| Tajik | tg |
| 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 |
| Vietnamese | vi |
| Volapük | vo |
| Wolof | wo |
| Welsh | cy |
| Xhosa | xh |
| Yiddish | yi |
| Yoruba | yo |
| Zulu | zu |
| Kazakh | kk |
ISO-3166 Country标准表：
| country | ISO-3166 Country Code |
|---|---|
| ALGERIA | DZ |
| AFGHANISTAN | AF |
| AMERICAN SAMOA | AS |
| ANDORRA | AD |
| ANTARCTICA | AQ |
| ALBANIA | AL |
| ANTIGUA AND BARBUDA | AG |
| ARGENTINA | AR |
| ARMENIA | AM |
| ARUBA | AW |
| AUSTRALIA | AU |
| AUSTRIA | AT |
| AZERBAIJAN | AZ |
| BAHAMAS | BS |
| BANGLADESH | BD |
| BARBADOS | BB |
| BELARUS | BY |
| BELGIUM | BE |
| BELIZE | BZ |
| BAHRAIN | BH |
| BENIN | BJ |
| BERMUDA | BM |
| BHUTAN | BT |
| BOSNIA AND HERZEGOVINA | BA |
| BOTSWANA | BW |
| BOLIVIA | BO |
| BOUVET ISLAND | BV |
| BRAZIL | BR |
| BRITISH INDIAN OCEAN TERRITORY | IO |
| BULGARIA | BG |
| BRUNEI DARUSSALAM | BN |
| BURKINA FASO | BF |
| BURUNDI | BI |
| CAMBODIA | KH |
| CAMEROON | CM |
| CANADA | CA |
| CAYMAN ISLANDS | KY |
| CENTRAL AFRICAN REPUBLIC | CF |
| CHAD | TD |
| CAPE VERDE | CV |
| 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 |
| CHILE | CL |
| CYPRUS | CY |
| CZECH REPUBLIC | CZ |
| DOMINICA | DM |
| DJIBOUTI | DJ |
| DOMINICAN REPUBLIC | DO |
| ECUADOR | EC |
| EGYPT | EG |
| DENMARK | DK |
| EL SALVADOR | SV |
| EQUATORIAL GUINEA | GQ |
| ESTONIA | EE |
| ETHIOPIA | ET |
| FALKLAND ISLANDS (MALVINAS) | FK |
| ANGOLA | AO |
| ERITREA | ER |
| FAROE ISLANDS | FO |
| FRANCE | FR |
| FRENCH GUIANA | GF |
| FRENCH POLYNESIA | PF |
| FRENCH SOUTHERN TERRITORIES | TF |
| GABON | GA |
| GAMBIA | GM |
| GEORGIA | GE |
| GERMANY | DE |
| GREECE | GR |
| GIBRALTAR | GI |
| GHANA | GH |
| GREENLAND | GL |
| GRENADA | GD |
| GUAM | GU |
| GUADELOUPE | GP |
| GUATEMALA | GT |
| GUINEA | GN |
| GUYANA | GY |
| HAITI | HT |
| GUINEA-BISSAU | GW |
| HONDURAS | HN |
| HEARD ISLAND AND MCDONALD ISLANDS | HM |
| HONG KONG | HK |
| HUNGARY | HU |
| ICELAND | IS |
| INDIA | IN |
| INDONESIA | ID |
| IRAN, ISLAMIC REPUBLIC OF | IR |
| FINLAND | FI |
| IRAQ | IQ |
| IRELAND | IE |
| ISRAEL | IL |
| JAMAICA | JM |
| JAPAN | JP |
| ITALY | IT |
| JORDAN | JO |
| KAZAKHSTAN | KZ |
| FIJI | FJ |
| KENYA | KE |
| KIRIBATI | KI |
| KOREA, DEMOCRATIC PEOPLE’S REPUBLIC OF | KP |
| KOREA, REPUBLIC OF | KR |
| KUWAIT | KW |
| LAO PEOPLE’S DEMOCRATIC REPUBLIC | LA |
| LATVIA | LV |
| LEBANON | LB |
| KYRGYZSTAN | KG |
| LESOTHO | LS |
| LIECHTENSTEIN | LI |
| LIBYAN ARAB JAMAHIRIYA | LY |
| LITHUANIA | LT |
| LUXEMBOURG | LU |
| MACEDONIA, THE FORMER YUGOSLAV REPUBLIC OF | MK |
| MALAWI | MW |
| LIBERIA | LR |
| MALDIVES | MV |
| MALAYSIA | MY |
| MALTA | MT |
| MARSHALL ISLANDS | MH |
| MACAO | MO |
| MARTINIQUE | MQ |
| MAURITIUS | MU |
| MAYOTTE | YT |
| MAURITANIA | MR |
| MALI | ML |
| MADAGASCAR | MG |
| MEXICO | MX |
| MICRONESIA, FEDERATED STATES OF | FM |
| MOLDOVA, REPUBLIC OF | MD |
| MONACO | MD |
| MONGOLIA | MN |
| MONTSERRAT | MS |
| MOZAMBIQUE | MZ |
| MYANMAR | MM |
| MOROCCO | MA |
| NAMIBIA | NA |
| NEPAL | NP |
| NETHERLANDS ANTILLES | AN |
| 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 |
| NAURU | NR |
| PALESTINIAN TERRITORY, OCCUPIED | PS |
| PAPUA NEW GUINEA | PG |
| PARAGUAY | PY |
| PERU | PE |
| PHILIPPINES | PH |
| PITCAIRN | PN |
| POLAND | PL |
| PUERTO RICO | PR |
| QATAR | QA |
| RÉUNION | RE |
| ROMANIA | RO |
| RUSSIAN FEDERATION | RU |
| RWANDA | RW |
| SAINT HELENA | SH |
| PANAMA | PA |
| SAINT KITTS AND NEVIS | KN |
| SAINT LUCIA | LC |
| SAINT PIERRE AND MIQUELON | PM |
| SAINT VINCENT AND THE GRENADINES | VC |
| SAMOA | WS |
| SAO TOME AND PRINCIPE | ST |
| SAN MARINO | SM |
| SAUDI ARABIA | SA |
| SENEGAL | SN |
| SERBIA AND MONTENEGRO | CS |
| SEYCHELLES | SC |
| SIERRA LEONE | SL |
| SINGAPORE | SG |
| SLOVAKIA | SK |
| SLOVENIA | SI |
| SOLOMON ISLANDS | SB |
| SOMALIA | SO |
| SOUTH AFRICA | ZA |
| SOUTH GEORGIA AND THE SOUTH SANDWICH ISLANDS | GS |
| SPAIN | ES |
| SRI LANKA | LK |
| SURINAME | SR |
| SVALBARD AND JAN MAYEN | SJ |
| SWAZILAND | SZ |
| SUDAN | SD |
| SWEDEN | SE |
| SYRIAN ARAB REPUBLIC | SY |
| SWITZERLAND | CH |
| TAIWAN, PROVINCE OF CHINA | TW |
| TAJIKISTAN | TJ |
| TANZANIA, UNITED REPUBLIC OF | TZ |
| TIMOR-LESTE | TL |
| TOGO | TG |
| THAILAND | TH |
| TONGA | TO |
| TOKELAU | TK |
| TUNISIA | TN |
| TURKEY | TR |
| TURKMENISTAN | TM |
| TURKS AND CAICOS ISLANDS | TC |
| TUVALU | TV |
| TRINIDAD AND TOBAGO | TT |
| UKRAINE | UA |
| UNITED ARAB EMIRATES | AE |
| UNITED STATES | US |
| UNITED KINGDOM | GB |
| URUGUAY | UY |
| UZBEKISTAN | UZ |
| UNITED STATES MINOR OUTLYING ISLANDS | UM |
| VANUATU | VU |
| VENEZUELA | VE |
| VIET NAM | VN |
| VIRGIN ISLANDS, BRITISH | VG |
| VIRGIN ISLANDS, U.S. | VI |
| WALLIS AND FUTUNA | WF |
| WESTERN SAHARA | EH |
| YEMEN | YE |
| UGANDA | UG |
| ZIMBABWE | ZW |
| ZAMBIA | ZM |