diacritical mark
diacritic

Before the spelling reform of 1904, there were several additional letters with diacritical marks.

The total number of possible letters is much higher if diacritical marks are added.

Give or take some missing letters and a million diacritical marks.

One solution is to employ diacritical marks to denote the tones.

For some loanwords, there are other letters or diacritical marks in use.

The extensive diacritical marks appear in the novel as published by Stern.

Punctuation and diacritical marks are available but almost impossible to remember.

Some English language terms have letters with diacritical marks.

This list specifies combinations of a diacritical mark and a second key.

The more difficult words are defined, and their pronunciation is indicated by diacritical marks.