Czech orthography is a system of rules for correct writing (orthography) in the Czech language.
The Czech orthographic system is diacritic. The caron is added to standard Latin letters for expressing sounds which are foreign to the Latin language (but some digraphs have been kept - ch, dž). The acute accent is used for long vowels.
The Czech orthography is considered the model for many other Slavic languages using the Latin alphabet; the Slovenian and Slovak orthographies as well as Gaj's Latin Alphabet are all based on the Czech.
The Czech alphabet consists of 42 letters (including the digraph Ch, which is considered a single letter in Czech).