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Five marks over a Latin alphabet.
Also known as: Vietnamese tone marks, Vietnamese accents
The Vietnamese marks writing tone on a Latin-based alphabet, the only such system in mainland Southeast Asia.
Write the five marked tones of Vietnamese; the sixth tone is unmarked.
Contexts: Language and transcription, Software
Stack on vowels that already carry a quality diacritic, which is why Vietnamese text has letters with two marks and why it was among the hardest scripts to render correctly in early digital typography.
Contexts: Language and transcription, Software
Unlike the Thai and Lao marks in this batch, the value of a Vietnamese tone mark is fixed and does not depend on the consonant — the region's other tonal notation solved the same problem the opposite way.
Contexts: Language and transcription, Software
An acute, a grave, a hook above, a tilde and a dot below, applied to vowels already carrying their own diacritics, so a single letter can bear two marks at once.