langid.hpp

/*
    SPDX-License-Identifier: MIT
    Copyright © 2024 Amebis
*/
 
#pragma once
 
#include "compat.hpp"
#include "string.hpp"
#include "unicode.hpp"
#ifdef _WIN32
#include "windows.h"
#endif
#include <stddef.h>
#include <stdint.h>
#include <map>
#include <string>
 
#if defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wexit-time-destructors"
#endif
 
namespace stdex
{
#ifdef _WIN32
    using langid = LANGID;
#else
    using langid = uint16_t;
#endif
 
    constexpr langid langid_neutral = 0x0;
    constexpr langid langid_unknown = 0x7f;
    constexpr langid langid_system = 0x800;
 
    constexpr langid sublangid_neutral = 0 << 10;            
    constexpr langid sublangid_default = 1 << 10;            
    constexpr langid sublangid_sys_default = 2 << 10;        
    constexpr langid sublangid_custom_default = 3 << 10;     
    constexpr langid sublangid_custom_unspecified = 4 << 10; 
    constexpr langid sublangid_ui_custom_default = 5 << 10;  
 
    inline constexpr langid primary_langid(_In_ langid lang)
    {
        return lang & 0x3ff;
    }
 
    inline constexpr langid sub_langid(_In_ langid lang)
    {
        return lang & 0xfc00;
    }
 
    inline langid langid_from_rfc1766(_In_z_ const char* rfc1766)
    {
        struct stricmp_less
        {
            bool operator()(_In_z_ const char* str1, _In_z_ const char* str2) const
            {
                stdex_assert(str1);
                stdex_assert(str2);
                size_t i;
                for (i = 0; ; ++i) {
                    auto a = stdex::tolower(str1[i]);
                    auto b = stdex::tolower(str2[i]);
                    if (!a && !b) return false;
                    if (!b) return false;
                    if (!a) return true;
                    auto a_punct = stdex::ispunct(a);
                    auto b_punct = stdex::ispunct(b);
                    if (a_punct && b_punct) continue;
                    if (b_punct) return false;
                    if (a_punct) return true;
                    if (a > b) return false;
                    if (a < b) return true;
                }
            }
        };
        static const std::map<const char*, int, stricmp_less> languages = {
            {"af-ZA", 0x436},          // Afrikaans (South Africa)
            {"af", 0x36},              // Afrikaans
            {"am-ET", 0x45e},          // Amharic (Ethiopia)
            {"am", 0x5e},              // Amharic
            {"ar-AE", 0x3801},         // Arabic (United Arab Emirates)
            {"ar-BH", 0x3c01},         // Arabic (Bahrain)
            {"ar-DZ", 0x1401},         // Arabic (Algeria)
            {"ar-EG", 0xc01},          // Arabic (Egypt)
            {"ar-IQ", 0x801},          // Arabic (Iraq)
            {"ar-JO", 0x2c01},         // Arabic (Jordan)
            {"ar-KW", 0x3401},         // Arabic (Kuwait)
            {"ar-LB", 0x3001},         // Arabic (Lebanon)
            {"ar-LY", 0x1001},         // Arabic (Libya)
            {"ar-MA", 0x1801},         // Arabic (Morocco)
            {"ar-OM", 0x2001},         // Arabic (Oman)
            {"ar-QA", 0x4001},         // Arabic (Qatar)
            {"ar-SA", 0x401},          // Arabic (Saudi Arabia)
            {"ar-SY", 0x2801},         // Arabic (Syria)
            {"ar-TN", 0x1c01},         // Arabic (Tunisia)
            {"ar-YE", 0x2401},         // Arabic (Yemen)
            {"ar", 0x1},               // Arabic
            {"arn-CL", 0x47a},         // Mapuche (Chile)
            {"arn", 0x7a},             // Mapuche
            {"as-IN", 0x44d},          // Assamese (India)
            {"as", 0x4d},              // Assamese
            {"az-Cyrl-AZ", 0x742c},    // Azerbaijani (Cyrillic, Azerbaijan)
            {"az-Cyrl-AZ", 0x82c},     // Azerbaijani (Cyrillic, Azerbaijan)
            {"az-Latn-AZ", 0x42c},     // Azerbaijani (Latin, Azerbaijan)
            {"az-Latn-AZ", 0x782c},    // Azerbaijani (Latin, Azerbaijan)
            {"az", 0x2c},              // Azerbaijani
            {"ba-RU", 0x46d},          // Bashkir (Russia)
            {"ba", 0x6d},              // Bashkir
            {"be-BY", 0x423},          // Belarusian (Belarus)
            {"be", 0x23},              // Belarusian
            {"bg-BG", 0x402},          // Bulgarian (Bulgaria)
            {"bg", 0x2},               // Bulgarian
            {"bin-NG", 0x466},         // Edo (Nigeria)
            {"bin", 0x66},             // Edo
            {"bn-BD", 0x845},          // Bangla (Bangladesh)
            {"bn-IN", 0x445},          // Bengali (India)
            {"bn", 0x45},              // Bangla
            {"bo-CN", 0x451},          // Tibetan (China)
            {"bo", 0x51},              // Tibetan
            {"br-FR", 0x47e},          // Breton (France)
            {"br", 0x7e},              // Breton
            {"bs-Cyrl-BA", 0x201a},    // Bosnian (Cyrillic, Bosnia and Herzegovina)
            {"bs-Cyrl-BA", 0x641a},    // Bosnian (Cyrillic, Bosnia and Herzegovina)
            {"bs-Latn-BA", 0x141a},    // Bosnian (Latin, Bosnia & Herzegovina)
            {"bs-Latn-BA", 0x681a},    // Bosnian (Latin, Bosnia & Herzegovina)
            {"bs-Latn-BA", 0x781a},    // Bosnian (Latin, Bosnia & Herzegovina)
            {"ca-ES-valencia", 0x803}, // Valencian (Spain)
            {"ca-ES", 0x403},          // Catalan (Catalan)
            {"ca", 0x3},               // Catalan
            {"chr-Cher-US", 0x45c},    // Cherokee (Cherokee, United States)
            {"chr-Cher-US", 0x7c5c},   // Cherokee (Cherokee, United States)
            {"chr", 0x5c},             // Cherokee
            {"co-FR", 0x483},          // Corsican (France)
            {"co", 0x83},              // Corsican
            {"cs-CZ", 0x405},          // Czech (Czechia)
            {"cs", 0x5},               // Czech
            {"cy-GB", 0x452},          // Welsh (United Kingdom)
            {"cy", 0x52},              // Welsh
            {"da-DK", 0x406},          // Danish (Denmark)
            {"da", 0x6},               // Danish
            {"de-AT", 0xc07},          // German (Austria)
            {"de-CH", 0x807},          // German (Switzerland)
            {"de-DE", 0x407},          // German (Germany)
            {"de-LI", 0x1407},         // German (Liechtenstein)
            {"de-LU", 0x1007},         // German (Luxembourg)
            {"de", 0x7},               // German
            {"dsb-DE", 0x7c2e},        // Lower Sorbian (Germany)
            {"dsb-DE", 0x82e},         // Lower Sorbian (Germany)
            {"dv-MV", 0x465},          // Divehi (Maldives)
            {"dv", 0x65},              // Divehi
            {"dz-BT", 0xc51},          // Dzongkha (Bhutan)
            {"el-GR", 0x408},          // Greek (Greece)
            {"el", 0x8},               // Greek
            {"en-029", 0x2409},        // English (Caribbean)
            {"en-AE", 0x4c09},         // English (United Arab Emirates)
            {"en-AU", 0xc09},          // English (Australia)
            {"en-BZ", 0x2809},         // English (Belize)
            {"en-CA", 0x1009},         // English (Canada)
            {"en-GB", 0x809},          // English (United Kingdom)
            {"en-HK", 0x3c09},         // English (Hong Kong SAR)
            {"en-ID", 0x3809},         // English (Indonesia)
            {"en-IE", 0x1809},         // English (Ireland)
            {"en-IN", 0x4009},         // English (India)
            {"en-JM", 0x2009},         // English (Jamaica)
            {"en-MY", 0x4409},         // English (Malaysia)
            {"en-NZ", 0x1409},         // English (New Zealand)
            {"en-PH", 0x3409},         // English (Philippines)
            {"en-SG", 0x4809},         // English (Singapore)
            {"en-TT", 0x2c09},         // English (Trinidad & Tobago)
            {"en-US", 0x409},          // English (United States)
            {"en-ZA", 0x1c09},         // English (South Africa)
            {"en-ZW", 0x3009},         // English (Zimbabwe)
            {"en", 0x9},               // English
            {"es-419", 0x580a},        // Spanish (Latin America)
            {"es-AR", 0x2c0a},         // Spanish (Argentina)
            {"es-BO", 0x400a},         // Spanish (Bolivia)
            {"es-CL", 0x340a},         // Spanish (Chile)
            {"es-CO", 0x240a},         // Spanish (Colombia)
            {"es-CR", 0x140a},         // Spanish (Costa Rica)
            {"es-CU", 0x5c0a},         // Spanish (Cuba)
            {"es-DO", 0x1c0a},         // Spanish (Dominican Republic)
            {"es-EC", 0x300a},         // Spanish (Ecuador)
            {"es-ES_tradnl", 0x40a},   // Spanish (Spain, Traditional Sort)
            {"es-ES", 0xc0a},          // Spanish (Spain, International Sort)
            {"es-GT", 0x100a},         // Spanish (Guatemala)
            {"es-HN", 0x480a},         // Spanish (Honduras)
            {"es-MX", 0x80a},          // Spanish (Mexico)
            {"es-NI", 0x4c0a},         // Spanish (Nicaragua)
            {"es-PA", 0x180a},         // Spanish (Panama)
            {"es-PE", 0x280a},         // Spanish (Peru)
            {"es-PR", 0x500a},         // Spanish (Puerto Rico)
            {"es-PY", 0x3c0a},         // Spanish (Paraguay)
            {"es-SV", 0x440a},         // Spanish (El Salvador)
            {"es-US", 0x540a},         // Spanish (United States)
            {"es-UY", 0x380a},         // Spanish (Uruguay)
            {"es-VE", 0x200a},         // Spanish (Venezuela)
            {"es", 0xa},               // Spanish
            {"et-EE", 0x425},          // Estonian (Estonia)
            {"et", 0x25},              // Estonian
            {"eu-ES", 0x42d},          // Basque (Basque)
            {"eu", 0x2d},              // Basque
            {"fa-AF", 0x48c},          // Persian (Afghanistan)
            {"fa-IR", 0x429},          // Persian (Iran)
            {"fa", 0x29},              // Persian
            {"fa", 0x8c},              // Persian
            {"ff-Latn-NG", 0x467},     // Fulah (Latin, Nigeria)
            {"ff-Latn-SN", 0x7c67},    // Fulah (Latin, Senegal)
            {"ff-Latn-SN", 0x867},     // Fulah (Latin, Senegal)
            {"ff", 0x67},              // Fulah
            {"fi-FI", 0x40b},          // Finnish (Finland)
            {"fi", 0xb},               // Finnish
            {"fil-PH", 0x464},         // Filipino (Philippines)
            {"fil", 0x64},             // Filipino
            {"fo-FO", 0x438},          // Faroese (Faroe Islands)
            {"fo", 0x38},              // Faroese
            {"fr-029", 0x1c0c},        // French (Caribbean)
            {"fr-BE", 0x80c},          // French (Belgium)
            {"fr-CA", 0xc0c},          // French (Canada)
            {"fr-CD", 0x240c},         // French Congo (DRC)
            {"fr-CH", 0x100c},         // French (Switzerland)
            {"fr-CI", 0x300c},         // French (Côte d’Ivoire)
            {"fr-CM", 0x2c0c},         // French (Cameroon)
            {"fr-FR", 0x40c},          // French (France)
            {"fr-HT", 0x3c0c},         // French (Haiti)
            {"fr-LU", 0x140c},         // French (Luxembourg)
            {"fr-MA", 0x380c},         // French (Morocco)
            {"fr-MC", 0x180c},         // French (Monaco)
            {"fr-ML", 0x340c},         // French (Mali)
            {"fr-RE", 0x200c},         // French (Réunion)
            {"fr-SN", 0x280c},         // French (Senegal)
            {"fr", 0xc},               // French
            {"fy-NL", 0x462},          // Western Frisian (Netherlands)
            {"fy", 0x62},              // Western Frisian
            {"ga-IE", 0x83c},          // Irish (Ireland)
            {"ga", 0x3c},              // Irish
            {"gd-GB", 0x491},          // Scottish Gaelic (United Kingdom)
            {"gd", 0x91},              // Scottish Gaelic
            {"gl-ES", 0x456},          // Galician (Galician)
            {"gl", 0x56},              // Galician
            {"gn-PY", 0x474},          // Guarani (Paraguay)
            {"gn", 0x74},              // Guarani
            {"gsw-FR", 0x484},         // Alsatian (France)
            {"gsw", 0x84},             // Swiss German
            {"gu-IN", 0x447},          // Gujarati (India)
            {"gu", 0x47},              // Gujarati
            {"ha-Latn-NG", 0x468},     // Hausa (Latin, Nigeria)
            {"ha-Latn-NG", 0x7c68},    // Hausa (Latin, Nigeria)
            {"ha", 0x68},              // Hausa
            {"haw-US", 0x475},         // Hawaiian (United States)
            {"haw", 0x75},             // Hawaiian
            {"he-IL", 0x40d},          // Hebrew (Israel)
            {"he", 0xd},               // Hebrew
            {"hi-IN", 0x439},          // Hindi (India)
            {"hi", 0x39},              // Hindi
            {"hr-BA", 0x101a},         // Croatian (Bosnia & Herzegovina)
            {"hr-HR", 0x41a},          // Croatian (Croatia)
            {"hr", 0x1a},              // Croatian
            {"hsb-DE", 0x42e},         // Upper Sorbian (Germany)
            {"hsb", 0x2e},             // Upper Sorbian
            {"hu-HU", 0x40e},          // Hungarian (Hungary)
            {"hu", 0xe},               // Hungarian
            {"hy-AM", 0x42b},          // Armenian (Armenia)
            {"hy", 0x2b},              // Armenian
            {"ibb-NG", 0x469},         // Ibibio (Nigeria)
            {"ibb", 0x69},             // Ibibio
            {"id-ID", 0x421},          // Indonesian (Indonesia)
            {"id", 0x21},              // Indonesian
            {"ig-NG", 0x470},          // Igbo (Nigeria)
            {"ig", 0x70},              // Igbo
            {"ii-CN", 0x478},          // Yi (China)
            {"ii", 0x78},              // Yi
            {"is-IS", 0x40f},          // Icelandic (Iceland)
            {"is", 0xf},               // Icelandic
            {"it-CH", 0x810},          // Italian (Switzerland)
            {"it-IT", 0x410},          // Italian (Italy)
            {"it", 0x10},              // Italian
            {"iu-Cans-CA", 0x45d},     // Inuktitut (Syllabics, Canada)
            {"iu-Cans-CA", 0x785d},    // Inuktitut (Syllabics, Canada)
            {"iu-Latn-CA", 0x7c5d},    // Inuktitut (Latin, Canada)
            {"iu-Latn-CA", 0x85d},     // Inuktitut (Latin, Canada)
            {"iu", 0x5d},              // Inuktitut
            {"ja-JP", 0x411},          // Japanese (Japan)
            {"ja", 0x11},              // Japanese
            {"ka-GE", 0x437},          // Georgian (Georgia)
            {"ka", 0x37},              // Georgian
            {"kk-KZ", 0x43f},          // Kazakh (Kazakhstan)
            {"kk", 0x3f},              // Kazakh
            {"kl-GL", 0x46f},          // Kalaallisut (Greenland)
            {"kl", 0x6f},              // Kalaallisut
            {"km-KH", 0x453},          // Khmer (Cambodia)
            {"km", 0x53},              // Khmer
            {"kn-IN", 0x44b},          // Kannada (India)
            {"kn", 0x4b},              // Kannada
            {"ko-KR", 0x412},          // Korean (Korea)
            {"ko", 0x12},              // Korean
            {"kok-IN", 0x457},         // Konkani (India)
            {"kok", 0x57},             // Konkani
            {"kr-Latn-NG", 0x471},     // Kanuri (Latin, Nigeria)
            {"kr", 0x71},              // Kanuri
            {"ks-Arab-IN", 0x460},     // Kashmiri (Arabic)
            {"ks-Deva-IN", 0x860},     // Kashmiri (Devanagari)
            {"ks", 0x60},              // Kashmiri
            {"ku-Arab-IQ", 0x492},     // Central Kurdish (Iraq)
            {"ku-Arab-IQ", 0x7c92},    // Central Kurdish (Iraq)
            {"ku", 0x92},              // Central Kurdish
            {"ky-KG", 0x440},          // Kyrgyz (Kyrgyzstan)
            {"ky", 0x40},              // Kyrgyz
            {"la-VA", 0x476},          // Latin (Vatican City)
            {"la", 0x76},              // Latin
            {"lb-LU", 0x46e},          // Luxembourgish (Luxembourg)
            {"lb", 0x6e},              // Luxembourgish
            {"lo-LA", 0x454},          // Lao (Laos)
            {"lo", 0x54},              // Lao
            {"lt-LT", 0x427},          // Lithuanian (Lithuania)
            {"lt", 0x27},              // Lithuanian
            {"lv-LV", 0x426},          // Latvian (Latvia)
            {"lv", 0x26},              // Latvian
            {"mi-NZ", 0x481},          // Maori (New Zealand)
            {"mi", 0x81},              // Maori
            {"mk-MK", 0x42f},          // Macedonian (North Macedonia)
            {"mk", 0x2f},              // Macedonian
            {"ml-IN", 0x44c},          // Malayalam (India)
            {"ml", 0x4c},              // Malayalam
            {"mn-MN", 0x450},          // Mongolian (Mongolia)
            {"mn-MN", 0x7850},         // Mongolian (Mongolia)
            {"mn-Mong-CN", 0x7c50},    // Mongolian (Traditional Mongolian, China)
            {"mn-Mong-CN", 0x850},     // Mongolian (Traditional Mongolian, China)
            {"mn-Mong-MN", 0xc50},     // Mongolian (Traditional Mongolian, Mongolia)
            {"mn", 0x50},              // Mongolian
            {"mni-IN", 0x458},         // Manipuri (Bangla, India)
            {"mni", 0x58},             // Manipuri
            {"moh-CA", 0x47c},         // Mohawk (Canada)
            {"moh", 0x7c},             // Mohawk
            {"mr-IN", 0x44e},          // Marathi (India)
            {"mr", 0x4e},              // Marathi
            {"ms-BN", 0x83e},          // Malay (Brunei)
            {"ms-MY", 0x43e},          // Malay (Malaysia)
            {"ms", 0x3e},              // Malay
            {"mt-MT", 0x43a},          // Maltese (Malta)
            {"mt", 0x3a},              // Maltese
            {"my-MM", 0x455},          // Burmese (Myanmar)
            {"my", 0x55},              // Burmese
            {"nb-NO", 0x414},          // Norwegian Bokmål (Norway)
            {"nb-NO", 0x7c14},         // Norwegian Bokmål (Norway)
            {"nb", 0x14},              // Norwegian Bokmål
            {"ne-IN", 0x861},          // Nepali (India)
            {"ne-NP", 0x461},          // Nepali (Nepal)
            {"ne", 0x61},              // Nepali
            {"nl-BE", 0x813},          // Dutch (Belgium)
            {"nl-NL", 0x413},          // Dutch (Netherlands)
            {"nl", 0x13},              // Dutch
            {"nn-NO", 0x7814},         // Norwegian Nynorsk (Norway)
            {"nn-NO", 0x814},          // Norwegian Nynorsk (Norway)
            {"nso-ZA", 0x46c},         // Sesotho sa Leboa (South Africa)
            {"nso", 0x6c},             // Sesotho sa Leboa
            {"oc-FR", 0x482},          // Occitan (France)
            {"oc", 0x82},              // Occitan
            {"om-ET", 0x472},          // Oromo (Ethiopia)
            {"om", 0x72},              // Oromo
            {"or-IN", 0x448},          // Odia (India)
            {"or", 0x48},              // Odia
            {"pa-Arab-PK", 0x7c46},    // Punjabi (Pakistan)
            {"pa-Arab-PK", 0x846},     // Punjabi (Pakistan)
            {"pa-IN", 0x446},          // Punjabi (India)
            {"pa", 0x46},              // Punjabi
            {"pap-029", 0x479},        // Papiamento (Caribbean)
            {"pap", 0x79},             // Papiamento
            {"pl-PL", 0x415},          // Polish (Poland)
            {"pl", 0x15},              // Polish
            {"ps-AF", 0x463},          // Pashto (Afghanistan)
            {"ps", 0x63},              // Pashto
            {"pt-BR", 0x416},          // Portuguese (Brazil)
            {"pt-PT", 0x816},          // Portuguese (Portugal)
            {"pt", 0x16},              // Portuguese
            {"qps-Latn-x-sh", 0x901},  // Pseudo (Pseudo Selfhost)
            {"qps-ploc", 0x501},       // Pseudo (Pseudo)
            {"qps-ploca", 0x5fe},      // Pseudo (Pseudo Asia)
            {"qps-plocm", 0x9ff},      // Pseudo (Pseudo Mirrored)
            {"quc-Latn-GT", 0x486},    // Kʼicheʼ (Latin, Guatemala)
            {"quc-Latn-GT", 0x7c86},   // Kʼicheʼ (Latin, Guatemala)
            {"quc", 0x86},             // Kʼicheʼ
            {"quz-BO", 0x46b},         // Quechua (Bolivia)
            {"quz-EC", 0x86b},         // Quechua (Ecuador)
            {"quz-PE", 0xc6b},         // Quechua (Peru)
            {"quz", 0x6b},             // Quechua
            {"rm-CH", 0x417},          // Romansh (Switzerland)
            {"rm", 0x17},              // Romansh
            {"ro-MD", 0x818},          // Romanian (Moldova)
            {"ro-RO", 0x418},          // Romanian (Romania)
            {"ro", 0x18},              // Romanian
            {"ru-MD", 0x819},          // Russian (Moldova)
            {"ru-RU", 0x419},          // Russian (Russia)
            {"ru", 0x19},              // Russian
            {"rw-RW", 0x487},          // Kinyarwanda (Rwanda)
            {"rw", 0x87},              // Kinyarwanda
            {"sa-IN", 0x44f},          // Sanskrit (India)
            {"sa", 0x4f},              // Sanskrit
            {"sah-RU", 0x485},         // Sakha (Russia)
            {"sah", 0x85},             // Sakha
            {"sd-Arab-PK", 0x7c59},    // Sindhi (Pakistan)
            {"sd-Arab-PK", 0x859},     // Sindhi (Pakistan)
            {"sd-Deva-IN", 0x459},     // Sindhi (Devanagari, India)
            {"sd", 0x59},              // Sindhi
            {"se-FI", 0xc3b},          // Sami, Northern (Finland)
            {"se-NO", 0x43b},          // Sami, Northern (Norway)
            {"se-SE", 0x83b},          // Sami, Northern (Sweden)
            {"se", 0x3b},              // Sami, Northern
            {"si-LK", 0x45b},          // Sinhala (Sri Lanka)
            {"si", 0x5b},              // Sinhala
            {"sk-SK", 0x41b},          // Slovak (Slovakia)
            {"sk", 0x1b},              // Slovak
            {"sl-SI", 0x424},          // Slovenian (Slovenia)
            {"sl", 0x24},              // Slovenian
            {"sma-NO", 0x183b},        // Sami, Southern (Norway)
            {"sma-SE", 0x1c3b},        // Sami, Southern (Sweden)
            {"sma-SE", 0x783b},        // Sami, Southern (Sweden)
            {"smj-NO", 0x103b},        // Sami, Lule (Norway)
            {"smj-SE", 0x143b},        // Sami, Lule (Sweden)
            {"smj-SE", 0x7c3b},        // Sami, Lule (Sweden)
            {"smn-FI", 0x243b},        // Sami, Inari (Finland)
            {"smn-FI", 0x703b},        // Sami, Inari (Finland)
            {"sms-FI", 0x203b},        // Sami, Skolt (Finland)
            {"sms-FI", 0x743b},        // Sami, Skolt (Finland)
            {"so-SO", 0x477},          // Somali (Somalia)
            {"so", 0x77},              // Somali
            {"sq-AL", 0x41c},          // Albanian (Albania)
            {"sq", 0x1c},              // Albanian
            {"sr-Cyrl-BA", 0x1c1a},    // Serbian (Cyrillic, Bosnia and Herzegovina)
            {"sr-Cyrl-CS", 0xc1a},     // Serbian (Cyrillic, Serbia and Montenegro (Former))
            {"sr-Cyrl-ME", 0x301a},    // Serbian (Cyrillic, Montenegro)
            {"sr-Cyrl-RS", 0x281a},    // Serbian (Cyrillic, Serbia)
            {"sr-Cyrl-RS", 0x6c1a},    // Serbian (Cyrillic, Serbia)
            {"sr-Latn-BA", 0x181a},    // Serbian (Latin, Bosnia & Herzegovina)
            {"sr-Latn-CS", 0x81a},     // Serbian (Latin, Serbia and Montenegro (Former))
            {"sr-Latn-ME", 0x2c1a},    // Serbian (Latin, Montenegro)
            {"sr-Latn-RS", 0x241a},    // Serbian (Latin, Serbia)
            {"sr-Latn-RS", 0x701a},    // Serbian (Latin, Serbia)
            {"sr-Latn-RS", 0x7c1a},    // Serbian (Latin, Serbia)
            {"st-ZA", 0x430},          // Sesotho (South Africa)
            {"st", 0x30},              // Sesotho
            {"sv-FI", 0x81d},          // Swedish (Finland)
            {"sv-SE", 0x41d},          // Swedish (Sweden)
            {"sv", 0x1d},              // Swedish
            {"sw-KE", 0x441},          // Kiswahili (Kenya)
            {"sw", 0x41},              // Kiswahili
            {"syr-SY", 0x45a},         // Syriac (Syria)
            {"syr", 0x5a},             // Syriac
            {"ta-IN", 0x449},          // Tamil (India)
            {"ta-LK", 0x849},          // Tamil (Sri Lanka)
            {"ta", 0x49},              // Tamil
            {"te-IN", 0x44a},          // Telugu (India)
            {"te", 0x4a},              // Telugu
            {"tg-Cyrl-TJ", 0x428},     // Tajik (Cyrillic, Tajikistan)
            {"tg-Cyrl-TJ", 0x7c28},    // Tajik (Cyrillic, Tajikistan)
            {"tg", 0x28},              // Tajik
            {"th-TH", 0x41e},          // Thai (Thailand)
            {"th", 0x1e},              // Thai
            {"ti-ER", 0x873},          // Tigrinya (Eritrea)
            {"ti-ET", 0x473},          // Tigrinya (Ethiopia)
            {"ti", 0x73},              // Tigrinya
            {"tk-TM", 0x442},          // Turkmen (Turkmenistan)
            {"tk", 0x42},              // Turkmen
            {"tn-BW", 0x832},          // Setswana (Botswana)
            {"tn-ZA", 0x432},          // Setswana (South Africa)
            {"tn", 0x32},              // Setswana
            {"tr-TR", 0x41f},          // Turkish (Türkiye)
            {"tr", 0x1f},              // Turkish
            {"ts-ZA", 0x431},          // Xitsonga (South Africa)
            {"ts", 0x31},              // Xitsonga
            {"tt-RU", 0x444},          // Tatar (Russia)
            {"tt", 0x44},              // Tatar
            {"tzm-Arab-MA", 0x45f},    // Central Atlas Tamazight (Arabic, Morocco)
            {"tzm-Latn-DZ", 0x7c5f},   // Central Atlas Tamazight (Latin, Algeria)
            {"tzm-Latn-DZ", 0x85f},    // Central Atlas Tamazight (Latin, Algeria)
            {"tzm-Tfng-MA", 0x105f},   // Central Atlas Tamazight (Tifinagh, Morocco)
            {"tzm-Tfng-MA", 0x785f},   // Central Atlas Tamazight (Tifinagh, Morocco)
            {"tzm", 0x5f},             // Central Atlas Tamazight
            {"ug-CN", 0x480},          // Uyghur (China)
            {"ug", 0x80},              // Uyghur
            {"uk-UA", 0x422},          // Ukrainian (Ukraine)
            {"uk", 0x22},              // Ukrainian
            {"ur-IN", 0x820},          // Urdu (India)
            {"ur-PK", 0x420},          // Urdu (Pakistan)
            {"ur", 0x20},              // Urdu
            {"uz-Cyrl-UZ", 0x7843},    // Uzbek (Cyrillic, Uzbekistan)
            {"uz-Cyrl-UZ", 0x843},     // Uzbek (Cyrillic, Uzbekistan)
            {"uz-Latn-UZ", 0x443},     // Uzbek (Latin, Uzbekistan)
            {"uz-Latn-UZ", 0x7c43},    // Uzbek (Latin, Uzbekistan)
            {"uz", 0x43},              // Uzbek
            {"ve-ZA", 0x433},          // Venda (South Africa)
            {"ve", 0x33},              // Venda
            {"vi-VN", 0x42a},          // Vietnamese (Vietnam)
            {"vi", 0x2a},              // Vietnamese
            {"wo-SN", 0x488},          // Wolof (Senegal)
            {"wo", 0x88},              // Wolof
            {"xh-ZA", 0x434},          // isiXhosa (South Africa)
            {"xh", 0x34},              // isiXhosa
            {"yi-001", 0x43d},         // Yiddish (World)
            {"yi", 0x3d},              // Yiddish
            {"yo-NG", 0x46a},          // Yoruba (Nigeria)
            {"yo", 0x6a},              // Yoruba
            {"zh-CN", 0x7804},         // Chinese (Simplified, China)
            {"zh-CN", 0x804},          // Chinese (Simplified, China)
            {"zh-HK", 0x7c04},         // Chinese (Traditional, Hong Kong SAR)
            {"zh-HK", 0xc04},          // Chinese (Traditional, Hong Kong SAR)
            {"zh-MO", 0x1404},         // Chinese (Traditional, Macao SAR)
            {"zh-SG", 0x1004},         // Chinese (Simplified, Singapore)
            {"zh-TW", 0x404},          // Chinese (Traditional, Taiwan)
            {"zh", 0x4},               // Chinese
            {"zu-ZA", 0x435},          // isiZulu (South Africa)
            {"zu", 0x35},              // isiZulu
        };
        if (auto el = languages.find(rfc1766); el != languages.end())
            return static_cast<langid>(el->second);
        return langid_unknown;
    }
 
    inline _Ret_maybenull_z_ const char* rfc1766_from_langid(_In_ langid lang, _In_opt_z_ const char* fallback = nullptr)
    {
        static const std::map<int, const char*> languages = {
            {0x1, "ar"},               // Arabic
            {0x401, "ar-SA"},          // Arabic (Saudi Arabia)
            {0x801, "ar-IQ"},          // Arabic (Iraq)
            {0xc01, "ar-EG"},          // Arabic (Egypt)
            {0x1001, "ar-LY"},         // Arabic (Libya)
            {0x1401, "ar-DZ"},         // Arabic (Algeria)
            {0x1801, "ar-MA"},         // Arabic (Morocco)
            {0x1c01, "ar-TN"},         // Arabic (Tunisia)
            {0x2001, "ar-OM"},         // Arabic (Oman)
            {0x2401, "ar-YE"},         // Arabic (Yemen)
            {0x2801, "ar-SY"},         // Arabic (Syria)
            {0x2c01, "ar-JO"},         // Arabic (Jordan)
            {0x3001, "ar-LB"},         // Arabic (Lebanon)
            {0x3401, "ar-KW"},         // Arabic (Kuwait)
            {0x3801, "ar-AE"},         // Arabic (United Arab Emirates)
            {0x3c01, "ar-BH"},         // Arabic (Bahrain)
            {0x4001, "ar-QA"},         // Arabic (Qatar)
            {0x2, "bg"},               // Bulgarian
            {0x402, "bg-BG"},          // Bulgarian (Bulgaria)
            {0x3, "ca"},               // Catalan
            {0x403, "ca-ES"},          // Catalan (Catalan)
            {0x803, "ca-ES-valencia"}, // Valencian (Spain)
            {0x4, "zh"},               // Chinese
            {0x404, "zh-TW"},          // Chinese (Traditional, Taiwan)
            {0x804, "zh-CN"},          // Chinese (Simplified, China)
            {0xc04, "zh-HK"},          // Chinese (Traditional, Hong Kong SAR)
            {0x1004, "zh-SG"},         // Chinese (Simplified, Singapore)
            {0x1404, "zh-MO"},         // Chinese (Traditional, Macao SAR)
            {0x7804, "zh-CN"},         // Chinese (Simplified, China)
            {0x7c04, "zh-HK"},         // Chinese (Traditional, Hong Kong SAR)
            {0x5, "cs"},               // Czech
            {0x405, "cs-CZ"},          // Czech (Czechia)
            {0x6, "da"},               // Danish
            {0x406, "da-DK"},          // Danish (Denmark)
            {0x7, "de"},               // German
            {0x407, "de-DE"},          // German (Germany)
            {0x807, "de-CH"},          // German (Switzerland)
            {0xc07, "de-AT"},          // German (Austria)
            {0x1007, "de-LU"},         // German (Luxembourg)
            {0x1407, "de-LI"},         // German (Liechtenstein)
            {0x8, "el"},               // Greek
            {0x408, "el-GR"},          // Greek (Greece)
            {0x9, "en"},               // English
            {0x409, "en-US"},          // English (United States)
            {0x809, "en-GB"},          // English (United Kingdom)
            {0xc09, "en-AU"},          // English (Australia)
            {0x1009, "en-CA"},         // English (Canada)
            {0x1409, "en-NZ"},         // English (New Zealand)
            {0x1809, "en-IE"},         // English (Ireland)
            {0x1c09, "en-ZA"},         // English (South Africa)
            {0x2009, "en-JM"},         // English (Jamaica)
            {0x2409, "en-029"},        // English (Caribbean)
            {0x2809, "en-BZ"},         // English (Belize)
            {0x2c09, "en-TT"},         // English (Trinidad & Tobago)
            {0x3009, "en-ZW"},         // English (Zimbabwe)
            {0x3409, "en-PH"},         // English (Philippines)
            {0x3809, "en-ID"},         // English (Indonesia)
            {0x3c09, "en-HK"},         // English (Hong Kong SAR)
            {0x4009, "en-IN"},         // English (India)
            {0x4409, "en-MY"},         // English (Malaysia)
            {0x4809, "en-SG"},         // English (Singapore)
            {0x4c09, "en-AE"},         // English (United Arab Emirates)
            {0xa, "es"},               // Spanish
            {0x40a, "es-ES_tradnl"},   // Spanish (Spain, Traditional Sort)
            {0x80a, "es-MX"},          // Spanish (Mexico)
            {0xc0a, "es-ES"},          // Spanish (Spain, International Sort)
            {0x100a, "es-GT"},         // Spanish (Guatemala)
            {0x140a, "es-CR"},         // Spanish (Costa Rica)
            {0x180a, "es-PA"},         // Spanish (Panama)
            {0x1c0a, "es-DO"},         // Spanish (Dominican Republic)
            {0x200a, "es-VE"},         // Spanish (Venezuela)
            {0x240a, "es-CO"},         // Spanish (Colombia)
            {0x280a, "es-PE"},         // Spanish (Peru)
            {0x2c0a, "es-AR"},         // Spanish (Argentina)
            {0x300a, "es-EC"},         // Spanish (Ecuador)
            {0x340a, "es-CL"},         // Spanish (Chile)
            {0x380a, "es-UY"},         // Spanish (Uruguay)
            {0x3c0a, "es-PY"},         // Spanish (Paraguay)
            {0x400a, "es-BO"},         // Spanish (Bolivia)
            {0x440a, "es-SV"},         // Spanish (El Salvador)
            {0x480a, "es-HN"},         // Spanish (Honduras)
            {0x4c0a, "es-NI"},         // Spanish (Nicaragua)
            {0x500a, "es-PR"},         // Spanish (Puerto Rico)
            {0x540a, "es-US"},         // Spanish (United States)
            {0x580a, "es-419"},        // Spanish (Latin America)
            {0x5c0a, "es-CU"},         // Spanish (Cuba)
            {0xb, "fi"},               // Finnish
            {0x40b, "fi-FI"},          // Finnish (Finland)
            {0xc, "fr"},               // French
            {0x40c, "fr-FR"},          // French (France)
            {0x80c, "fr-BE"},          // French (Belgium)
            {0xc0c, "fr-CA"},          // French (Canada)
            {0x100c, "fr-CH"},         // French (Switzerland)
            {0x140c, "fr-LU"},         // French (Luxembourg)
            {0x180c, "fr-MC"},         // French (Monaco)
            {0x1c0c, "fr-029"},        // French (Caribbean)
            {0x200c, "fr-RE"},         // French (Réunion)
            {0x240c, "fr-CD"},         // French Congo (DRC)
            {0x280c, "fr-SN"},         // French (Senegal)
            {0x2c0c, "fr-CM"},         // French (Cameroon)
            {0x300c, "fr-CI"},         // French (Côte d’Ivoire)
            {0x340c, "fr-ML"},         // French (Mali)
            {0x380c, "fr-MA"},         // French (Morocco)
            {0x3c0c, "fr-HT"},         // French (Haiti)
            {0xd, "he"},               // Hebrew
            {0x40d, "he-IL"},          // Hebrew (Israel)
            {0xe, "hu"},               // Hungarian
            {0x40e, "hu-HU"},          // Hungarian (Hungary)
            {0xf, "is"},               // Icelandic
            {0x40f, "is-IS"},          // Icelandic (Iceland)
            {0x10, "it"},              // Italian
            {0x410, "it-IT"},          // Italian (Italy)
            {0x810, "it-CH"},          // Italian (Switzerland)
            {0x11, "ja"},              // Japanese
            {0x411, "ja-JP"},          // Japanese (Japan)
            {0x12, "ko"},              // Korean
            {0x412, "ko-KR"},          // Korean (Korea)
            {0x13, "nl"},              // Dutch
            {0x413, "nl-NL"},          // Dutch (Netherlands)
            {0x813, "nl-BE"},          // Dutch (Belgium)
            {0x14, "nb"},              // Norwegian Bokmål
            {0x414, "nb-NO"},          // Norwegian Bokmål (Norway)
            {0x814, "nn-NO"},          // Norwegian Nynorsk (Norway)
            {0x7814, "nn-NO"},         // Norwegian Nynorsk (Norway)
            {0x7c14, "nb-NO"},         // Norwegian Bokmål (Norway)
            {0x15, "pl"},              // Polish
            {0x415, "pl-PL"},          // Polish (Poland)
            {0x16, "pt"},              // Portuguese
            {0x416, "pt-BR"},          // Portuguese (Brazil)
            {0x816, "pt-PT"},          // Portuguese (Portugal)
            {0x17, "rm"},              // Romansh
            {0x417, "rm-CH"},          // Romansh (Switzerland)
            {0x18, "ro"},              // Romanian
            {0x418, "ro-RO"},          // Romanian (Romania)
            {0x818, "ro-MD"},          // Romanian (Moldova)
            {0x19, "ru"},              // Russian
            {0x419, "ru-RU"},          // Russian (Russia)
            {0x819, "ru-MD"},          // Russian (Moldova)
            {0x1a, "hr"},              // Croatian
            {0x41a, "hr-HR"},          // Croatian (Croatia)
            {0x81a, "sr-Latn-CS"},     // Serbian (Latin, Serbia and Montenegro (Former))
            {0xc1a, "sr-Cyrl-CS"},     // Serbian (Cyrillic, Serbia and Montenegro (Former))
            {0x101a, "hr-BA"},         // Croatian (Bosnia & Herzegovina)
            {0x141a, "bs-Latn-BA"},    // Bosnian (Latin, Bosnia & Herzegovina)
            {0x181a, "sr-Latn-BA"},    // Serbian (Latin, Bosnia & Herzegovina)
            {0x1c1a, "sr-Cyrl-BA"},    // Serbian (Cyrillic, Bosnia and Herzegovina)
            {0x201a, "bs-Cyrl-BA"},    // Bosnian (Cyrillic, Bosnia and Herzegovina)
            {0x241a, "sr-Latn-RS"},    // Serbian (Latin, Serbia)
            {0x281a, "sr-Cyrl-RS"},    // Serbian (Cyrillic, Serbia)
            {0x2c1a, "sr-Latn-ME"},    // Serbian (Latin, Montenegro)
            {0x301a, "sr-Cyrl-ME"},    // Serbian (Cyrillic, Montenegro)
            {0x641a, "bs-Cyrl-BA"},    // Bosnian (Cyrillic, Bosnia and Herzegovina)
            {0x681a, "bs-Latn-BA"},    // Bosnian (Latin, Bosnia & Herzegovina)
            {0x6c1a, "sr-Cyrl-RS"},    // Serbian (Cyrillic, Serbia)
            {0x701a, "sr-Latn-RS"},    // Serbian (Latin, Serbia)
            {0x781a, "bs-Latn-BA"},    // Bosnian (Latin, Bosnia & Herzegovina)
            {0x7c1a, "sr-Latn-RS"},    // Serbian (Latin, Serbia)
            {0x1b, "sk"},              // Slovak
            {0x41b, "sk-SK"},          // Slovak (Slovakia)
            {0x1c, "sq"},              // Albanian
            {0x41c, "sq-AL"},          // Albanian (Albania)
            {0x1d, "sv"},              // Swedish
            {0x41d, "sv-SE"},          // Swedish (Sweden)
            {0x81d, "sv-FI"},          // Swedish (Finland)
            {0x1e, "th"},              // Thai
            {0x41e, "th-TH"},          // Thai (Thailand)
            {0x1f, "tr"},              // Turkish
            {0x41f, "tr-TR"},          // Turkish (Türkiye)
            {0x20, "ur"},              // Urdu
            {0x420, "ur-PK"},          // Urdu (Pakistan)
            {0x820, "ur-IN"},          // Urdu (India)
            {0x21, "id"},              // Indonesian
            {0x421, "id-ID"},          // Indonesian (Indonesia)
            {0x22, "uk"},              // Ukrainian
            {0x422, "uk-UA"},          // Ukrainian (Ukraine)
            {0x23, "be"},              // Belarusian
            {0x423, "be-BY"},          // Belarusian (Belarus)
            {0x24, "sl"},              // Slovenian
            {0x424, "sl-SI"},          // Slovenian (Slovenia)
            {0x25, "et"},              // Estonian
            {0x425, "et-EE"},          // Estonian (Estonia)
            {0x26, "lv"},              // Latvian
            {0x426, "lv-LV"},          // Latvian (Latvia)
            {0x27, "lt"},              // Lithuanian
            {0x427, "lt-LT"},          // Lithuanian (Lithuania)
            {0x28, "tg"},              // Tajik
            {0x428, "tg-Cyrl-TJ"},     // Tajik (Cyrillic, Tajikistan)
            {0x7c28, "tg-Cyrl-TJ"},    // Tajik (Cyrillic, Tajikistan)
            {0x29, "fa"},              // Persian
            {0x429, "fa-IR"},          // Persian (Iran)
            {0x2a, "vi"},              // Vietnamese
            {0x42a, "vi-VN"},          // Vietnamese (Vietnam)
            {0x2b, "hy"},              // Armenian
            {0x42b, "hy-AM"},          // Armenian (Armenia)
            {0x2c, "az"},              // Azerbaijani
            {0x42c, "az-Latn-AZ"},     // Azerbaijani (Latin, Azerbaijan)
            {0x82c, "az-Cyrl-AZ"},     // Azerbaijani (Cyrillic, Azerbaijan)
            {0x742c, "az-Cyrl-AZ"},    // Azerbaijani (Cyrillic, Azerbaijan)
            {0x782c, "az-Latn-AZ"},    // Azerbaijani (Latin, Azerbaijan)
            {0x2d, "eu"},              // Basque
            {0x42d, "eu-ES"},          // Basque (Basque)
            {0x2e, "hsb"},             // Upper Sorbian
            {0x42e, "hsb-DE"},         // Upper Sorbian (Germany)
            {0x82e, "dsb-DE"},         // Lower Sorbian (Germany)
            {0x7c2e, "dsb-DE"},        // Lower Sorbian (Germany)
            {0x2f, "mk"},              // Macedonian
            {0x42f, "mk-MK"},          // Macedonian (North Macedonia)
            {0x30, "st"},              // Sesotho
            {0x430, "st-ZA"},          // Sesotho (South Africa)
            {0x31, "ts"},              // Xitsonga
            {0x431, "ts-ZA"},          // Xitsonga (South Africa)
            {0x32, "tn"},              // Setswana
            {0x432, "tn-ZA"},          // Setswana (South Africa)
            {0x832, "tn-BW"},          // Setswana (Botswana)
            {0x33, "ve"},              // Venda
            {0x433, "ve-ZA"},          // Venda (South Africa)
            {0x34, "xh"},              // isiXhosa
            {0x434, "xh-ZA"},          // isiXhosa (South Africa)
            {0x35, "zu"},              // isiZulu
            {0x435, "zu-ZA"},          // isiZulu (South Africa)
            {0x36, "af"},              // Afrikaans
            {0x436, "af-ZA"},          // Afrikaans (South Africa)
            {0x37, "ka"},              // Georgian
            {0x437, "ka-GE"},          // Georgian (Georgia)
            {0x38, "fo"},              // Faroese
            {0x438, "fo-FO"},          // Faroese (Faroe Islands)
            {0x39, "hi"},              // Hindi
            {0x439, "hi-IN"},          // Hindi (India)
            {0x3a, "mt"},              // Maltese
            {0x43a, "mt-MT"},          // Maltese (Malta)
            {0x3b, "se"},              // Sami, Northern
            {0x43b, "se-NO"},          // Sami, Northern (Norway)
            {0x83b, "se-SE"},          // Sami, Northern (Sweden)
            {0xc3b, "se-FI"},          // Sami, Northern (Finland)
            {0x103b, "smj-NO"},        // Sami, Lule (Norway)
            {0x143b, "smj-SE"},        // Sami, Lule (Sweden)
            {0x183b, "sma-NO"},        // Sami, Southern (Norway)
            {0x1c3b, "sma-SE"},        // Sami, Southern (Sweden)
            {0x203b, "sms-FI"},        // Sami, Skolt (Finland)
            {0x243b, "smn-FI"},        // Sami, Inari (Finland)
            {0x703b, "smn-FI"},        // Sami, Inari (Finland)
            {0x743b, "sms-FI"},        // Sami, Skolt (Finland)
            {0x783b, "sma-SE"},        // Sami, Southern (Sweden)
            {0x7c3b, "smj-SE"},        // Sami, Lule (Sweden)
            {0x3c, "ga"},              // Irish
            {0x83c, "ga-IE"},          // Irish (Ireland)
            {0x3d, "yi"},              // Yiddish
            {0x43d, "yi-001"},         // Yiddish (World)
            {0x3e, "ms"},              // Malay
            {0x43e, "ms-MY"},          // Malay (Malaysia)
            {0x83e, "ms-BN"},          // Malay (Brunei)
            {0x3f, "kk"},              // Kazakh
            {0x43f, "kk-KZ"},          // Kazakh (Kazakhstan)
            {0x40, "ky"},              // Kyrgyz
            {0x440, "ky-KG"},          // Kyrgyz (Kyrgyzstan)
            {0x41, "sw"},              // Kiswahili
            {0x441, "sw-KE"},          // Kiswahili (Kenya)
            {0x42, "tk"},              // Turkmen
            {0x442, "tk-TM"},          // Turkmen (Turkmenistan)
            {0x43, "uz"},              // Uzbek
            {0x443, "uz-Latn-UZ"},     // Uzbek (Latin, Uzbekistan)
            {0x843, "uz-Cyrl-UZ"},     // Uzbek (Cyrillic, Uzbekistan)
            {0x7843, "uz-Cyrl-UZ"},    // Uzbek (Cyrillic, Uzbekistan)
            {0x7c43, "uz-Latn-UZ"},    // Uzbek (Latin, Uzbekistan)
            {0x44, "tt"},              // Tatar
            {0x444, "tt-RU"},          // Tatar (Russia)
            {0x45, "bn"},              // Bangla
            {0x445, "bn-IN"},          // Bengali (India)
            {0x845, "bn-BD"},          // Bangla (Bangladesh)
            {0x46, "pa"},              // Punjabi
            {0x446, "pa-IN"},          // Punjabi (India)
            {0x846, "pa-Arab-PK"},     // Punjabi (Pakistan)
            {0x7c46, "pa-Arab-PK"},    // Punjabi (Pakistan)
            {0x47, "gu"},              // Gujarati
            {0x447, "gu-IN"},          // Gujarati (India)
            {0x48, "or"},              // Odia
            {0x448, "or-IN"},          // Odia (India)
            {0x49, "ta"},              // Tamil
            {0x449, "ta-IN"},          // Tamil (India)
            {0x849, "ta-LK"},          // Tamil (Sri Lanka)
            {0x4a, "te"},              // Telugu
            {0x44a, "te-IN"},          // Telugu (India)
            {0x4b, "kn"},              // Kannada
            {0x44b, "kn-IN"},          // Kannada (India)
            {0x4c, "ml"},              // Malayalam
            {0x44c, "ml-IN"},          // Malayalam (India)
            {0x4d, "as"},              // Assamese
            {0x44d, "as-IN"},          // Assamese (India)
            {0x4e, "mr"},              // Marathi
            {0x44e, "mr-IN"},          // Marathi (India)
            {0x4f, "sa"},              // Sanskrit
            {0x44f, "sa-IN"},          // Sanskrit (India)
            {0x50, "mn"},              // Mongolian
            {0x450, "mn-MN"},          // Mongolian (Mongolia)
            {0x850, "mn-Mong-CN"},     // Mongolian (Traditional Mongolian, China)
            {0xc50, "mn-Mong-MN"},     // Mongolian (Traditional Mongolian, Mongolia)
            {0x7850, "mn-MN"},         // Mongolian (Mongolia)
            {0x7c50, "mn-Mong-CN"},    // Mongolian (Traditional Mongolian, China)
            {0x51, "bo"},              // Tibetan
            {0x451, "bo-CN"},          // Tibetan (China)
            {0xc51, "dz-BT"},          // Dzongkha (Bhutan)
            {0x52, "cy"},              // Welsh
            {0x452, "cy-GB"},          // Welsh (United Kingdom)
            {0x53, "km"},              // Khmer
            {0x453, "km-KH"},          // Khmer (Cambodia)
            {0x54, "lo"},              // Lao
            {0x454, "lo-LA"},          // Lao (Laos)
            {0x55, "my"},              // Burmese
            {0x455, "my-MM"},          // Burmese (Myanmar)
            {0x56, "gl"},              // Galician
            {0x456, "gl-ES"},          // Galician (Galician)
            {0x57, "kok"},             // Konkani
            {0x457, "kok-IN"},         // Konkani (India)
            {0x58, "mni"},             // Manipuri
            {0x458, "mni-IN"},         // Manipuri (Bangla, India)
            {0x59, "sd"},              // Sindhi
            {0x459, "sd-Deva-IN"},     // Sindhi (Devanagari, India)
            {0x859, "sd-Arab-PK"},     // Sindhi (Pakistan)
            {0x7c59, "sd-Arab-PK"},    // Sindhi (Pakistan)
            {0x5a, "syr"},             // Syriac
            {0x45a, "syr-SY"},         // Syriac (Syria)
            {0x5b, "si"},              // Sinhala
            {0x45b, "si-LK"},          // Sinhala (Sri Lanka)
            {0x5c, "chr"},             // Cherokee
            {0x45c, "chr-Cher-US"},    // Cherokee (Cherokee, United States)
            {0x7c5c, "chr-Cher-US"},   // Cherokee (Cherokee, United States)
            {0x5d, "iu"},              // Inuktitut
            {0x45d, "iu-Cans-CA"},     // Inuktitut (Syllabics, Canada)
            {0x85d, "iu-Latn-CA"},     // Inuktitut (Latin, Canada)
            {0x785d, "iu-Cans-CA"},    // Inuktitut (Syllabics, Canada)
            {0x7c5d, "iu-Latn-CA"},    // Inuktitut (Latin, Canada)
            {0x5e, "am"},              // Amharic
            {0x45e, "am-ET"},          // Amharic (Ethiopia)
            {0x5f, "tzm"},             // Central Atlas Tamazight
            {0x45f, "tzm-Arab-MA"},    // Central Atlas Tamazight (Arabic, Morocco)
            {0x85f, "tzm-Latn-DZ"},    // Central Atlas Tamazight (Latin, Algeria)
            {0x105f, "tzm-Tfng-MA"},   // Central Atlas Tamazight (Tifinagh, Morocco)
            {0x785f, "tzm-Tfng-MA"},   // Central Atlas Tamazight (Tifinagh, Morocco)
            {0x7c5f, "tzm-Latn-DZ"},   // Central Atlas Tamazight (Latin, Algeria)
            {0x60, "ks"},              // Kashmiri
            {0x460, "ks-Arab-IN"},     // Kashmiri (Arabic)
            {0x860, "ks-Deva-IN"},     // Kashmiri (Devanagari)
            {0x61, "ne"},              // Nepali
            {0x461, "ne-NP"},          // Nepali (Nepal)
            {0x861, "ne-IN"},          // Nepali (India)
            {0x62, "fy"},              // Western Frisian
            {0x462, "fy-NL"},          // Western Frisian (Netherlands)
            {0x63, "ps"},              // Pashto
            {0x463, "ps-AF"},          // Pashto (Afghanistan)
            {0x64, "fil"},             // Filipino
            {0x464, "fil-PH"},         // Filipino (Philippines)
            {0x65, "dv"},              // Divehi
            {0x465, "dv-MV"},          // Divehi (Maldives)
            {0x66, "bin"},             // Edo
            {0x466, "bin-NG"},         // Edo (Nigeria)
            {0x67, "ff"},              // Fulah
            {0x467, "ff-Latn-NG"},     // Fulah (Latin, Nigeria)
            {0x867, "ff-Latn-SN"},     // Fulah (Latin, Senegal)
            {0x7c67, "ff-Latn-SN"},    // Fulah (Latin, Senegal)
            {0x68, "ha"},              // Hausa
            {0x468, "ha-Latn-NG"},     // Hausa (Latin, Nigeria)
            {0x7c68, "ha-Latn-NG"},    // Hausa (Latin, Nigeria)
            {0x69, "ibb"},             // Ibibio
            {0x469, "ibb-NG"},         // Ibibio (Nigeria)
            {0x6a, "yo"},              // Yoruba
            {0x46a, "yo-NG"},          // Yoruba (Nigeria)
            {0x6b, "quz"},             // Quechua
            {0x46b, "quz-BO"},         // Quechua (Bolivia)
            {0x86b, "quz-EC"},         // Quechua (Ecuador)
            {0xc6b, "quz-PE"},         // Quechua (Peru)
            {0x6c, "nso"},             // Sesotho sa Leboa
            {0x46c, "nso-ZA"},         // Sesotho sa Leboa (South Africa)
            {0x6d, "ba"},              // Bashkir
            {0x46d, "ba-RU"},          // Bashkir (Russia)
            {0x6e, "lb"},              // Luxembourgish
            {0x46e, "lb-LU"},          // Luxembourgish (Luxembourg)
            {0x6f, "kl"},              // Kalaallisut
            {0x46f, "kl-GL"},          // Kalaallisut (Greenland)
            {0x70, "ig"},              // Igbo
            {0x470, "ig-NG"},          // Igbo (Nigeria)
            {0x71, "kr"},              // Kanuri
            {0x471, "kr-Latn-NG"},     // Kanuri (Latin, Nigeria)
            {0x72, "om"},              // Oromo
            {0x472, "om-ET"},          // Oromo (Ethiopia)
            {0x73, "ti"},              // Tigrinya
            {0x473, "ti-ET"},          // Tigrinya (Ethiopia)
            {0x873, "ti-ER"},          // Tigrinya (Eritrea)
            {0x74, "gn"},              // Guarani
            {0x474, "gn-PY"},          // Guarani (Paraguay)
            {0x75, "haw"},             // Hawaiian
            {0x475, "haw-US"},         // Hawaiian (United States)
            {0x76, "la"},              // Latin
            {0x476, "la-VA"},          // Latin (Vatican City)
            {0x77, "so"},              // Somali
            {0x477, "so-SO"},          // Somali (Somalia)
            {0x78, "ii"},              // Yi
            {0x478, "ii-CN"},          // Yi (China)
            {0x79, "pap"},             // Papiamento
            {0x479, "pap-029"},        // Papiamento (Caribbean)
            {0x7a, "arn"},             // Mapuche
            {0x47a, "arn-CL"},         // Mapuche (Chile)
            {0x7c, "moh"},             // Mohawk
            {0x47c, "moh-CA"},         // Mohawk (Canada)
            {0x7e, "br"},              // Breton
            {0x47e, "br-FR"},          // Breton (France)
            {0x80, "ug"},              // Uyghur
            {0x480, "ug-CN"},          // Uyghur (China)
            {0x81, "mi"},              // Maori
            {0x481, "mi-NZ"},          // Maori (New Zealand)
            {0x82, "oc"},              // Occitan
            {0x482, "oc-FR"},          // Occitan (France)
            {0x83, "co"},              // Corsican
            {0x483, "co-FR"},          // Corsican (France)
            {0x84, "gsw"},             // Swiss German
            {0x484, "gsw-FR"},         // Alsatian (France)
            {0x85, "sah"},             // Sakha
            {0x485, "sah-RU"},         // Sakha (Russia)
            {0x86, "quc"},             // Kʼicheʼ
            {0x486, "quc-Latn-GT"},    // Kʼicheʼ (Latin, Guatemala)
            {0x7c86, "quc-Latn-GT"},   // Kʼicheʼ (Latin, Guatemala)
            {0x87, "rw"},              // Kinyarwanda
            {0x487, "rw-RW"},          // Kinyarwanda (Rwanda)
            {0x88, "wo"},              // Wolof
            {0x488, "wo-SN"},          // Wolof (Senegal)
            {0x8c, "fa"},              // Persian
            {0x48c, "fa-AF"},          // Persian (Afghanistan)
            {0x91, "gd"},              // Scottish Gaelic
            {0x491, "gd-GB"},          // Scottish Gaelic (United Kingdom)
            {0x92, "ku"},              // Central Kurdish
            {0x492, "ku-Arab-IQ"},     // Central Kurdish (Iraq)
            {0x7c92, "ku-Arab-IQ"},    // Central Kurdish (Iraq)
            {0x501, "qps-ploc"},       // Pseudo (Pseudo)
            {0x901, "qps-Latn-x-sh"},  // Pseudo (Pseudo Selfhost)
            {0x5fe, "qps-ploca"},      // Pseudo (Pseudo Asia)
            {0x9ff, "qps-plocm"},      // Pseudo (Pseudo Mirrored)
        };
        if (auto el = languages.find(lang); el != languages.end())
            return el->second;
        return fallback;
    }
}
 
#if defined(__GNUC__)
#pragma GCC diagnostic pop
#endif