Korean and Japanese is fun! Functions. 1. Func of Korean Alphabet, Hangul study. 2. Func of Korean Words study. 3. Func of Korean Phrases study. 4. Drill of Korean Words and Phrases. 5. Func of Insert Words and Phrases. 1. Func of Japanese Alphabet study. 2. Func of Japanese Words study. 3. Func of Japanese Phrases study.