noun
diacritical mark; diacritic
Linguistic term for marks added to letters to indicate a different pronunciation, such as accents, umlauts, or cedillas.
フランス語では、発音区別符号が母音の上に付くことが多い。
In French, diacritical marks are often placed above vowels.
Compound of 発音 (pronunciation) + 区別 (distinction) + 符号 (symbol). A straightforward technical term.