Question: What is the number of millions of people using a writing system that was created in the 15th century by King Sejong the Great ?

text: List of writing systems
List of writing scripts by adoption
Main article : List of languages by writing system
The Graphic systems or writing systems (or scripts) are classified according to some common distinguishing characteristics. There are about 4,000 languages that make use of an established writing system. The usual name of the script is given first; the name of the language(s) in which the script is written follows (in brackets), particularly in the case where the language name differs from the script name. Other informative or qualifying annotations for the script may also be provided.
Name of script Type Number of characters Population actively using ( in millions ) Languages associated with Regions with predominant usage
Latin Latin Alphabet 23 ( classical ) 6120+ Latin and Romance languages ( Italian , French , Franco-Provençal , Occitan , Catalan , Portuguese , Galician , Spanish , Rhaeto-Romance languages , Sardinian and Romanian ) , Germanic languages ( English , Dutch , German , Nordic languages ) , Chinese ( Mandarin Pinyin ) , Austronesian languages ( Indonesian , Filipino , Malay , Polynesian languages ) , West and Southwest Slavic languages ( including Polish ) , Baltic languages ( Latvian and Lithuanian ) , Niger-Congo languages ( including Swahili , Yoruba , and Zulu ) , Turkish , Somali , Albanian , Vietnamese , Hungarian , Maltese , Finnic ( including Estonian and Finnish ) and Sami languages , others Worldwide
Chinese 汉字 漢字 Logographic > 50,000 1340 Mandarin , Yue , Wu , Gan , Min , Hakka , Xiang , Jin , Pinghua , Huizhou and other Chinese languages ( Chinese characters ) , Japanese ( Kanji ) , Korean ( Hanja ) , Vietnamese ( Chu Nom ) , Zhuang ( Sawndip ) , Okinawan ( Okinawan ) , Mulam China , Taiwan , Singapore , Malaysia ( Chinese Malaysians ) , Japan , South Korea , Indonesia ( Chinese Indonesians ) , Hong Kong
Devanagari देवनागरी Abugida 44 820+ Angika , Awadhi , Bhili , Bhojpuri , Bodo , Chhattisgarhi , Dogri , Haryanvi , Hindi , Kashmiri , Konkani , Magahi , Maithili , Marathi , Mundari , Nepali , Newar , Pali , Rajasthani , Sanskrit , Santali , Sindhi , others India ( native in Hindi Belt , Goa , Maharashtra ) , Nepal
Arabic العربية Abjad 28 660+ Arabic , Persian , Urdu , Punjabi , Pashto , Sindhi , Balochi , Malayan ( Jawi ) , Acehnese ( Jawi ) , Uyghur , Kazakh ( in China ) , Kurdish , Azeri ( in Iran ) , Javanese ( Pegon ) , Sundanese ( Pegon ) , others Middle East and North Africa , Pakistan , India ( 7 states ) , China ( Xinjiang ) , Brunei ( co-official with Latin ) , Malaysia , Indonesia ( religious uses only )
Bengali-Assamese script Abugida 52 300 Sanskrit , Bengali , Assamese , Kokborok , Bishnupriya Manipuri , Khasi , Meitei Manipuri , Hajong , Chakma , Maithili ( historical use ) , Angika ( historical use ) , Sylheti and others Bangladesh , and India ( West Bengal , Mizoram , Jharkhand , Tripura , Assam , Manipur , Meghalaya , Andaman and Nicobar Islands )
Cyrillic Кирилица Alphabet 33 ( Russian ) 250 Bulgarian , Russian , Serbian , Ukrainian , Macedonian , Belarusian , Kazakh , others Eastern Europe , Central Asia and Mongolia , the Russian Far East
Kana かな カナ Syllabary 46 120 Japanese , Okinawan , Ainu , Palauan , other Japonic languages Japan
Javanese ꦗꦮ Abugida 53 80 Javanese , Cirebonese , Madurese , Sundanese Indonesia ( Central Java , East Java , Special Region of Yogyakarta , Cirebon , Cirebon Regency , Indramayu Regency ) , Javanese diaspora
Chosŏn'gŭl/Hangul 한글 조선글 Alphabet , featural 24 78.7 Korean , Cia-Cia , Jeju North Korea , South Korea , and Yanbian Korean Autonomous Prefecture of China , Indonesia ( Baubau )
Telugu తెలుగు Abugida 60 74 Telugu , Sanskrit , Gondi Andhra Pradesh , Telangana , Puducherry ( India )
Tamil தமிழ் Abugida 30 70 Tamil , Kanikkaran , Badaga , Irula , Paniya Tamil Nadu ( India ) , Puducherry ( India ) , Sri Lanka , Singapore , Malaysia , Mauritius
Gujarati ગુજરાતી Abugida 47 48 Gujarati , Kutchi , Avestan , Bhili , Bhilori , Gamit , Chowdhary , Kukna , Bhili , Varli , Vasavi India , Pakistan
Kannada ಕನ್ನಡ Abugida 51 ( or 50 or 49 ) 45 Kannada , Tulu , Kodava , Badaga , Beary , Sanketi , Konkani , Sanskrit Karnataka ( India )
Burmese မြန်မာ Abugida 26 39 Burmese , Pali , Sanskrit Myanmar
Malayalam മലയാളം Abugida 51 38 Malayalam , Sanskrit , Paniya , Betta Kurumba , Ravula Kerala , Puducherry ( India )
Thai ไทย Abugida 68 38 Thai , Northern Thai , Southern Thai , Northern Khmer , and Isan , Kelantan-Pattani Malay , Pali , Sanskrit , others Thailand
Sundanese ᮞᮥᮔ᮪ᮓ Abugida 44 38 Sundanese , Bantenese , Baduy West Java and Banten ( Indonesia )
Zhuyin Fuhao ( a.k.a . Bopomofo ) ㄅㄆㄇㄈ ㄓㄨㄧㄣ ㄈㄨˊㄏㄠˋ Alphabet , Semisyllabary 37 ( plus four tone marks ) 23 A phonetic transcription system used in Taiwan for Mandarin Chinese , studied mainly by schoolchildren Taiwan
Gurmukhi ਗੁਰਮੁਖੀ Abugida 35 22 Sanskrit , Punjabi , Sant Bhasha , Sindhi Punjab ( India )
Odia ଉତ୍କଳ Abugida 64 21 Odia , others Odisha ( India )