Hmmm...some people have brought up Hangul as a significant scientific achievement . Let’s take a look at that, shall we?
“This phenomenon is good news for Koreans, since it offers and opportunity to announce this hidden treasure of Korea to the world. As you know, hangul is the only scientifically designed letter-system in the world, and this fact is recognized by most philologists. However if a foreigner were to ask you "What makes hangul a scientific letter-system?", would you be prepared to answer?
Why is hangul so scientific? An excellent response to this question has been supplied by Paek Do-hyun, professor of Kyungpook National University, who has posted a comprehensive explanation of hangul on his homepage. Firstly, hangul is a totally original letter-system, famous for its creator and its manner of creation (though there is some evidence of its origin in Semitic writing and Chinese characters). Secondly, the most significant distinguishing mark of hangul is its basis on the vocal organs. For example, the "ㄱ" shape indicates a tongue touching the roof of the mouth, while "ㅁ" shows the mouth, and "ㅇ" is patterned on the shape of a throat.”
http://www.knutimes.com/news/article.html?no=474
Sounds impressive. Only scientifically designed letter system in the world, eh?

King Sejong, who is credited with inventing Hangul, must have been an absolute genius. Or at least that’s what we are told.
Actually, there was another scientifically created script circulating in Korea in the late 13th Century and half way through the 14th Century. This was Phags-pa.
Phags-pa script
In 1260 Kublai Khan commissioned a Tibetan Lama called Blo-gros rGyal-mtshan, who is better known by the title
Phags-pa Lama, to create a new national script to replace the
Uighur-based script, which was devised in 1208. An edict was issued in 1269 requiring the use of the new script in all official documents, along with the local script as appropriate.
The old Mongolian script was thought unsuitable because it was borrowed from the Uighurs rather than being a unique Mongol creation; and because it didn't do a very good job of representing the sounds of Mongolian, let only other languages such as Chinese. It is probable that Kublai Khan hoped that the new script would be used to write all the languages spoken within his empire, and he ordered the establishment of schools to teach the new script.
The script was originally called "Mongolian new letters" - 蒙古新字 (měnggǔ xīnzì) in Chinese, a name still used in Tibetan. However the script is now known as
dörbelǰin üsüg, square script, in Mongolian and as 八思巴字 (bāsībā zì), Phags-pa letters, in Chinese. In English the script is referred to as the Mongolian Quadratic Script, or more commonly, the Phags-pa scipt, a name with many variant spellings.
https://www.omniglot.com/writing/phagspa.htm
Where did Phags-pa Lama get this idea from?
Well, Phags-pa was from Tibet so he drew his inspiration from the Brahmi scripts of India. Brahmi scripts or Indic scripts were scientifically created, as well. As in, the shapes of the various letters correspond to the various tongue positions in the mouth or the shape of the mouth when vocalizing them. Pretty cool.
The
Brahmic scripts are a family of
abugida or
alphabet writing systems. They are used throughout the
Indian subcontinent,
Southeast Asia and parts of
East Asia, including
Japan in the form of
Siddhaṃ. They are descended from the
Brahmi script of ancient
India, and are used by languages of several language families:
Indo-European,
Dravidian,
Tibeto-Burman,
Mongolic,
Austroasiatic,
Austronesian, and
Tai. They were also the source of the
dictionary order of
Japanese kana.
[1]
https://en.m.wikipedia.org/wiki/Brahmic_scripts
Sorry for the wall of text. I am sort of a geek about language scripts. Hee hee. I have studied Thai and it’s written script as well as Korean and it’s written script, Hangul. I never dreamed that they were related but for some reason, I always had that thought in the back of my mind.
Anyway, this is a really cool video. Watch this so you don’t have to read any more. It’ll explain the connection between Hangul, Phags-pa and the various Indic scripts including Thai. It’s absolutely fascinating.

Well...for language script geeks anyway.
Note: He spelled Hangul as Hadgul. He admits this in the comments.
Edit: Added a link.