Such letter combinations are sometimes even collated as a single distinct letter. For example, the spelling sch was traditionally often treated as a separate letter in German. Words with that spelling were listed after all other words spelled with s in card catalogs in the Vienna public libraries, for example (before digitization).

Types

Among the types of diacritic used in alphabets based on the Latin script are:
* accents (so called because the acute, grave, and circumflex were originally

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