The addition of diacritical marks

Capable of distinguishing or of making a distinction. / Of, pertaining to, or serving as a diacritic

A diacritic (mark).

distinguishing / (orthography, not comparable) Denoting a distinguishing mark applied to a letter or character.

A special mark added to a letter to indicate a different pronunciation, stress, tone, or meaning.

plural of diacritic

plural of diacritical

In a diacritical manner.

To add diacritical marks

simple past tense and past participle of diacritize