In other alphabetic systems, diacritical marks may perform other functions.
For instance, in German where two words differ only by an umlaut, the word without it is sorted first in German dictionaries (e.g. In Spanish, the grapheme ñ is considered a new letter different from n and collated between n and o, as it denotes a different sound from that of a plain n. Diacritic is primarily an adjective, though sometimes used as a noun, whereas diacritical is only ever an adjective.Some diacritical marks, such as the acute ( ´ ) and grave ( ` ), are often called accents.Different languages use different rules to put diacritic characters in alphabetical order.
French treats letters with diacritical marks the same as the underlying letter for purposes of ordering and dictionaries.
The tilde, dot, comma, titlo, apostrophe, bar, and colon are sometimes diacritical marks, but also have other uses.