Comment by kjellsbells
Comment by kjellsbells 8 days ago
Reminds me of Vietnamese and its use of diacritics to mark tones. Vietnamese also uses diacritical markings to differentiate some vowels.
https://en.wikipedia.org/wiki/Vietnamese_phonology#Tone?wpro...
There is speculation that the polytonic accents in Greek (which were a late addition to the alphabet, incidentally), originally were tone markers. ΄ represented a rising tone, ` a falling tone and ῀ a rising then falling tone.