The following are secondary language identifiers. They can be combined with primary language identifiers to form language identifiers.
| Identifier | Predefined Symbol | Language |
|---|---|---|
| 0x00 | SUBLANG_NEUTRAL | Neutral |
| 0x01 | SUBLANG_DEFAULT | Default |
| 0x02 | SUBLANG_SYS_DEFAULT | System Default |
| 0x01 | SUBLANG_ARABIC_SAUDI_ARABIA | Arabic (Saudi Arabia) |
| 0x02 | SUBLANG_ARABIC_IRAQ | Arabic (Iraq) |
| 0x03 | SUBLANG_ARABIC_EGYPT | Arabic (Egypt) |
| 0x04 | SUBLANG_ARABIC_LIBYA | Arabic (Libya) |
| 0x05 | SUBLANG_ARABIC_ALGERIA | Arabic (Algeria) |
| 0x06 | SUBLANG_ARABIC_MOROCCO | Arabic (Morocco) |
| 0x07 | SUBLANG_ARABIC_TUNISIA | Arabic (Tunisia) |
| 0x08 | SUBLANG_ARABIC_OMAN | Arabic (Oman) |
| 0x09 | SUBLANG_ARABIC_YEMEN | Arabic (Yemen) |
| 0x10 | SUBLANG_ARABIC_SYRIA | Arabic (Syria) |
| 0x11 | SUBLANG_ARABIC_JORDAN | Arabic (Jordan) |
| 0x12 | SUBLANG_ARABIC_LEBANON | Arabic (Lebanon) |
| 0x13 | SUBLANG_ARABIC_KUWAIT | Arabic (Kuwait) |
| 0x14 | SUBLANG_ARABIC_UAE | Arabic (U.A.E.) |
| 0x15 | SUBLANG_ARABIC_BAHRAIN | Arabic (Bahrain) |
| 0x16 | SUBLANG_ARABIC_QATAR | Arabic (Qatar) |
| 0x01 | SUBLANG_AZERI_CYRILLIC | Azeri (Latin) |
| 0x02 | SUBLANG_AZERI_LATIN | Azeri (Cyrillic) |
| 0x01 | SUBLANG_CHINESE_TRADITIONAL | Chinese (Traditional) |
| 0x02 | SUBLANG_CHINESE_SIMPLIFIED | Chinese (Simplified) |
| 0x03 | SUBLANG_CHINESE_HONGKONG | Chinese (Hong Kong SAR, PRC) |
| 0x04 | SUBLANG_CHINESE_SINGAPORE | Chinese (Singapore) |
| 0x05 | SUBLANG_CHINESE_MACAU | Chinese (Macau) |
| 0x01 | SUBLANG_DUTCH | Dutch |
| 0x02 | SUBLANG_DUTCH_BELGIAN | Dutch (Belgian) |
| 0x01 | SUBLANG_ENGLISH_US | English (US) |
| 0x02 | SUBLANG_ENGLISH_UK | English (UK) |
| 0x03 | SUBLANG_ENGLISH_AUS | English (Australian) |
| 0x04 | SUBLANG_ENGLISH_CAN | English (Canadian) |
| 0x05 | SUBLANG_ENGLISH_NZ | English (New Zealand) |
| 0x06 | SUBLANG_ENGLISH_EIRE | English (Ireland) |
| 0x07 | SUBLANG_ENGLISH_SOUTH_AFRICA | English (South Africa) |
| 0x08 | SUBLANG_ENGLISH_JAMAICA | English (Jamaica) |
| 0x09 | SUBLANG_ENGLISH_CARIBBEAN | English (Caribbean) |
| 0x0a | SUBLANG_ENGLISH_BELIZE | English (Belize) |
| 0x0b | SUBLANG_ENGLISH_TRINIDAD | English (Trinidad) |
| 0x0c | SUBLANG_ENGLISH_PHILIPPINES | English (Zimbabwe) |
| 0x0d | SUBLANG_ENGLISH_ZIMBABWE | English (Philippines) |
| 0x01 | SUBLANG_FRENCH | French |
| 0x02 | SUBLANG_FRENCH_BELGIAN | French (Belgian) |
| 0x03 | SUBLANG_FRENCH_CANADIAN | French (Canadian) |
| 0x04 | SUBLANG_FRENCH_SWISS | French (Swiss) |
| 0x05 | SUBLANG_FRENCH_LUXEMBOURG | French (Luxembourg) |
| 0x06 | SUBLANG_FRENCH_MONACO | French (Monaco) |
| 0x01 | SUBLANG_GERMAN | German |
| 0x02 | SUBLANG_GERMAN_SWISS | German (Swiss) |
| 0x03 | SUBLANG_GERMAN_AUSTRIAN | German (Austrian) |
| 0x04 | SUBLANG_GERMAN_LUXEMBOURG | German (Luxembourg) |
| 0x05 | SUBLANG_GERMAN_LIECHTENSTEIN | German (Liechtenstein) |
| 0x01 | SUBLANG_ITALIAN | Italian |
| 0x02 | SUBLANG_ITALIAN_SWISS | Italian (Swiss) |
| 0x02 | SUBLANG_KASHMIRI_INDIA | Kashmiri (India) |
| 0x01 | SUBLANG_KOREAN | Korean |
| 0x01 | SUBLANG_LITHUANIAN | Lithuanian |
| 0x02 | SUBLANG_LITHUANIAN_CLASSIC | Lithuanian (Classic) |
| 0x01 | SUBLANG_MALAY_MALAYSIA | Malay (Malaysia) |
| 0x02 | SUBLANG_MALAY_BRUNEI_DARUSSALAM | Malay (Brunei Darassalam) |
| 0x02 | SUBLANG_NEPALI_INDIA | Nepali (India) |
| 0x01 | SUBLANG_NORWEGIAN_BOKMAL | Norwegian (Bokmal) |
| 0x02 | SUBLANG_NORWEGIAN_NYNORSK | Norwegian (Nynorsk) |
| 0x01 | SUBLANG_PORTUGUESE | Portuguese (Brazilian) |
| 0x02 | SUBLANG_PORTUGUESE_BRAZILIAN | Portuguese |
| 0x02 | SUBLANG_SERBIAN_LATIN | Serbian (Latin) |
| 0x03 | SUBLANG_SERBIAN_CYRILLIC | Serbian (Cyrillic) |
| 0x01 | SUBLANG_SPANISH | Spanish (Castilian) |
| 0x02 | SUBLANG_SPANISH_MEXICAN | Spanish (Mexican) |
| 0x03 | SUBLANG_SPANISH_MODERN | Spanish (Modern) |
| 0x04 | SUBLANG_SPANISH_GUATEMALA | Spanish (Guatemala) |
| 0x05 | SUBLANG_SPANISH_COSTA_RICA | Spanish (Costa Rica) |
| 0x06 | SUBLANG_SPANISH_PANAMA | Spanish (Panama) |
| 0x07 | SUBLANG_SPANISH_DOMINICAN_REPUBLIC | Spanish (Dominican Republic) |
| 0x08 | SUBLANG_SPANISH_VENEZUELA | Spanish (Venezuela) |
| 0x09 | SUBLANG_SPANISH_COLOMBIA | Spanish (Colombia) |
| 0x0a | SUBLANG_SPANISH_PERU | Spanish (Peru) |
| 0x0b | SUBLANG_SPANISH_ARGENTINA | Spanish (Argentina) |
| 0x0c | SUBLANG_SPANISH_ECUADOR | Spanish (Ecuador) |
| 0x0d | SUBLANG_SPANISH_CHILE | Spanish (Chile) |
| 0x0e | SUBLANG_SPANISH_URUGUAY | Spanish (Uruguay) |
| 0x0f | SUBLANG_SPANISH_PARAGUAY | Spanish (Paraguay) |
| 0x10 | SUBLANG_SPANISH_BOLIVIA | Spanish (Bolivia) |
| 0x11 | SUBLANG_SPANISH_EL_SALVADOR | Spanish (El Salvador) |
| 0x12 | SUBLANG_SPANISH_HONDURAS | Spanish (Honduras) |
| 0x13 | SUBLANG_SPANISH_NICARAGUA | Spanish (Nicaragua) |
| 0x14 | SUBLANG_SPANISH_PUERTO_RICO | Spanish (Puerto Rico) |
| 0x01 | SUBLANG_SWEDISH | Swedish |
| 0x02 | SUBLANG_SWEDISH_FINLAND | Swedish (Finland) |
| 0x01 | SUBLANG_URDU_PAKISTAN | Urdu (Pakistan) |
| 0x02 | SUBLANG_URDU_INDIA | Urdu (India) |
| 0x01 | SUBLANG_UZBEK_LATIN | Uzbek (Latin) |
| 0x02 | SUBLANG_UZBEK_CYRILLIC | Uzbek (Cyrillic) |