Diacritic

Among the types of diacritic used in alphabets based on the Latin script are:

The tilde, dot, comma, titlo, apostrophe, bar, and colon are sometimes diacritical marks, but also have other uses.

These diacritics are used in addition to the acute, grave, and circumflex accents and the diaeresis:

Some non-alphabetic scripts also employ symbols that function essentially as diacritics.

Different languages use different rules to put diacritic characters in alphabetical order. French and Portuguese treat letters with diacritical marks the same as the underlying letter for purposes of ordering and dictionaries.

For a comprehensive list of the collating orders in various languages, see Collating sequence.

Modern computer technology was developed mostly in English-speaking countries, so data formats, keyboard layouts, etc. were developed with a bias favoring English, a language with an alphabet without diacritical marks. Efforts have been made to create internationalized domain names that further extend the English alphabet (e.g., "pokémon.com").

The following languages have letters that contain diacritics that are considered independent letters distinct from those without diacritics.

The following languages have letter-diacritic combinations that are not considered independent letters.

Several languages that are not written with the Roman alphabet are transliterated, or romanized, using diacritics. Examples:

TIBETAN LETTER HA + TIBETAN SUBJOINED LETTER KA + TIBETAN SUBJOINED LETTER SSA + TIBETAN SUBJOINED LETTER MA + TIBETAN SUBJOINED LETTER LA + TIBETAN SUBJOINED LETTER FIXED-FORM WA + TIBETAN SUBJOINED LETTER FIXED-FORM RA + TIBETAN SUBJOINED LETTER FIXED-FORM YA + TIBETAN SIGN NYI ZLA NAA DA
c̳̻͚̻̩̻͉̯̄̏͑̋͆̎͐ͬ͑͌́͢h̵͔͈͍͇̪̯͇̞͖͇̜͉̪̪̤̙ͧͣ̓̐̓ͤ͋͒ͥ͑̆͒̓͋̑́͞ǎ̡̮̤̤̬͚̝͙̞͎̇ͧ͆͊ͅo̴̲̺͓̖͖͉̜̟̗̮̳͉̻͉̫̯̫̍̋̿̒͌̃̂͊̏̈̏̿ͧ́ͬ̌ͥ̇̓̀͢͜s̵̵̘̹̜̝̘̺̙̻̠̱͚̤͓͚̠͙̝͕͆̿̽ͥ̃͠͡

Some users have explored the limits of rendering in web browsers and other software by "decorating" words with multiple nonsensical diacritics per character. The result is called "Zalgo text". The composed bogus characters and words can be copied and pasted normally via the system clipboard.