Origin of Hangul
Ledyard holds that the Koreans adopted five core consonant letters from ’Phags-pa, namely ㄱ "g" , ㄷ "d" , ㅂ "b" , ㅈ "j" , and ㄹ "l" . These were the consonants basic to Chinese phonology, rather than the graphically simplest letters (ㄱ "g" , ㄴ "n" , ㅁ "m" , and ㅅ "s" ) taken as the starting point by the "Haerye." A sixth letter, the null initial ㅇ, was invented by Sejong. The rest of the consonants were developed through featural derivation from these six, essentially as described in the "Haerye"; a resemblance to speech organs was an additional motivating factor in selecting the shapes of both the basic letters and their derivatives.
Hunminjeongeum Society
The Hunminjeongeum Society, sometimes called the "Hunminjeongeum Research Institute" in English-language newspaper accounts, is a private organization in Seoul dedicated to the propagation of Hangul to all the unwritten languages of the world. ("Hunminjeongeum" was the original name of hangul.) The society was founded by Lee Ki-nam, a retired real-estate agent, in 2007, after she had failed to bring hangul to the Tungusic Oroqen of Heilongjiang, China; the Chepang of Nepal; and the Lahu of Chiang Mai, Thailand; she attributed these failures to a reliance on Korean Christian missionaries in those countries, whose primary focus was not linguistics or literacy.