Language Code為設定網頁的語言碼。使用2位半形英文字代表下列語系，語言碼右邊加上(-)之後可放副語系。例如美國的英文為"en-us"，英國的的英文為"en-gb"，台灣的中文為"zh-tw"，中華人民共和國的中文為"zh-ch"。
- AA
- AFAR
- AB
- ABKHAZIAN
- AF
- AFRIKAANS
- AM
- AMHARIC
- AR
- ARABIC
- AS
- ASSAMESE
- AY
- AYMARA
- AZ
- AZERBAIJANI
- BA
- BASHKIR
- BE
- BYELORUSSIAN
- BG
- BULGARIAN
- BH
- BIHARI
- BI
- BISLAMA
- BN
- BENGALI;BANGLA
- BO
- TIBETAN
- BR
- BRETON
- CA
- CATALAN
- CO
- CORSICAN
- CS
- CZECH
- CY
- WELSH
- DA
- DANISH
- DE
- GERMAN
- DZ
- BHUTANI
- EL
- GREEK
- EN
- ENGLISH
- EO
- ESPERANTO
- ES
- SPANISH
- ET
- ESTONIAN
- EU
- BASQUE
- FA
- PERSIAN (farsi)
- FI
- FINNISH
- FJ
- FIJI
- FO
- FAROESE
- FR
- FRENCH
- FY
- FRISIAN
- GA
- IRISH
- GD
- SCOTS GAELIC
- GL
- GALICIAN
- GN
- GUARANI
- GU
- GUJARATI
- HA
- HAUSA
- HE
- HEBREW
- HI
- HINDI
- HR
- CROATIAN
- HU
- HUNGARIAN
- HY
- ARMENIAN
- IA
- INTERLINGUA
- IE
- INTERLINGUE
- IK
- INUPIAK
- ID
- INDONESIAN
- IS
- ICELANDIC
- IT
- ITALIAN
- IU
- INUKTITUT
- JA
- JAPANESE
- JV
- JAVANESE
- KA
- GEORGIAN
- KK
- KAZAKH
- KL
- GREENLANDIC
- KM
- CAMBODIAN
- KN
- KANNADA
- KO
- KOREAN
- KS
- KASHMIRI
- KU
- KURDISH
- KY
- KIRGHIZ
- LA
- LATIN
- LN
- LINGALA
- LO
- LAOTHIAN
- LT
- LITHUANIAN
- LV
- LATVIAN;LETTISH
- MG
- MALAGASY
- MI
- MAORI
- MK
- MACEDONIAN
- ML
- MALAYALAM
- MN
- MONGOLIAN
- MO
- MOLDAVIAN
- MR
- MARATHI
- MS
- MALAY
- MT
- MALTESE
- MY
- BURMESE
- NA
- NAURU
- NE
- NEPALI
- NL
- DUTCH
- NO
- NORWEGIAN
- OC
- OCCITAN
- OM
- AFAN (OROMO)
- OR
- ORIYA
- PA
- PUNJABI
- PL
- POLISH
- PS
- PASHTO;PUSHTO
- PT
- PORTUGUESE
- QU
- QUECHUA
- RM
- RHAETO-ROMANCE
- RN
- KURUNDI
- RO
- ROMANIAN
- RU
- RUSSIAN
- RW
- KINYARWANDA
- SA
- SANSKRIT
- SD
- SINDHI
- SG
- SANGHO
- SH
- SERBO-CROATIAN
- SI
- SINGHALESE
- SK
- SLOVAK
- SL
- SLOVENIAN
- SM
- SAMOAN
- SN
- SHONA
- SO
- SOMALI
- SQ
- ALBANIAN
- SR
- SERBIAN
- SS
- SISWATI
- ST
- SESOTHO
- SU
- SUNDANESE
- SV
- SWEDISH
- SW
- SWAHILI
- TA
- TAMIL
- TE
- TELUGU
- TG
- TAJIK
- TH
- THAI
- TI
- TIGRINYA
- TK
- TURKMEN
- TL
- TAGALOG
- TN
- SETSWANA
- TO
- TONGA
- TR
- TURKISH
- TS
- TSONGA
- TT
- TATAR
- TW
- TWI
- UG
- UIGUR
- UK
- UKRAINIAN
- UR
- URDU
- UZ
- UZBEK
- VI
- VIETNAMESE
- VO
- VOLAPUK
- WO
- WOLOF
- XH
- XHOSA
- YI
- YIDDISH
- YO
- YORUBA
- ZA
- ZHUANG
- ZH
- CHINESE
- ZU
- ZULU
- 相關語言碼參考「http://xml.coverpages.org/iso639a.html」