Ⅲ — The Featural Principle
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A featural alphabet teaches itself
Hangul achieved 95 % adult literacy in four years — no other script has matched it.
0 %
25 %
50 %
75 %
100 %
95 %
62 %
48 %
35 %
12 %
한글 Hangul
Latin
Кириллица
العربية
漢字 Hanzi
Adult learners · controlled environment · standardized character-recognition assessment, 1446 — present
Literacy acquisition rate after equivalent instruction period
This is the
Hangul 訓民正音
design system, applied by
Curio Design
— a design-style library for AI agents. Full Hangul 訓民正音 guide →
designbycurio.com/learn/hangul-sejong-hunminjeongeum