For the case of Aheui, it is essentially a Hangul-branded version of Befunge [1] (or if you are interested in the history of esolangs, it is actually more like

For the case of Aheui, it is essentially a Hangul-branded version of Befunge [1] (or if you are interested in the history of esolangs, it is actually more like Orthogonal [2] but Aheui didn't really derive from it). Besides from the fact that Aheui's usage of Hangul is novel, I wouldn't consider it a fundamental paradigm shift. [1] https://esolangs.org/wiki/Befunge https://esolangs.org/wiki/Befunge [2] https://esolangs.org/wiki/Orthogonal https://esolangs.org/wiki/Orthogonal