Czech orthography is a system of rules for proper formal writing (orthography) in Czech. The earliest form of separate Latin script specifically designed to suit Czech was devised by Czech theologian and church reformist Jan Hus, the namesake of the Hussite movement, in one of his seminal works, De orthographia bohemica (On Bohemian orthography).
The modern Czech orthographic system is diacritic, having evolved from an earlier system which used many digraphs (although one digraph has been kept - ch). The caron (known as háček in Czech) is added to standard Latin letters to express sounds which are foreign to Latin. The acute accent is used for long vowels.
