You can blame a Jesuit priest for the diacritics. He published a Vietnamese-Portugese-Latin dictionary in 1641 and invented the modern Vietnamese script. https

You can blame a Jesuit priest for the diacritics. He published a Vietnamese-Portugese-Latin dictionary in 1641 and invented the modern Vietnamese script. https://en.wikipedia.org/wiki/Dictionarium_Annamiticum_Lusitanum_et_Latinum https://en.wikipedia.org/wiki/Dictionarium_Annamiticum_Lusit...