Postfix is natural to Korean people since a verb comes after an object in Korean language.
Also Forth does not restrict a programmer to use only alphanumeric characters. A Korean Forth programmer can easily express his idea in comfortable Korean words rather than to be forced to think in English. As one might expect, there was an effort for Korean Forth. Unfortunately, Korean computer community swiftly moved to IBM PC while Dr. Pyun wrote articles about their work in popular programming and science magazines. It became somewhat obsolete before being known widely.