[DeepL Translation - needs review] Question, "Something I've seen twice with my mother but never with my father, what is it?" (Answer, Kuchibiru). This riddle from the Muromachi period shows that "haha" was pronounced like "fa-fa" at that time. So how did Japanese pronunciation change over time? Were there eight vowels in the Nara period? Why are there multiple readings of kanji, such as "ko" and "gyou" for "line" and "gyo" for "line"? What is the truth about ancient languages as revealed by...
