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Seven marks for tone and length.
Also known as: Nko diacritics
The N'Ko diacritics writing tone and vowel length above and below the letters.
Write tone and vowel length on N'Ko letters.
Contexts: Language and transcription
Designed in from the start rather than added later, which is the practical advantage of an invented script: the Latin orthographies for the same languages had to bolt tone marking onto an alphabet that never expected it.
Contexts: Language and transcription
Small strokes, dots and arcs set above and below the letters, seven in all, marking tone height and vowel length together.