quality:corruption, information:filtering
Hus and the Czech language

The works of Jan Hus incorporate reforms to medieval Czech orthography, including the "hook" (háček) diacritic which was used to form the graphemes ⟨ č ⟩, ⟨ ě ⟩, ⟨ š ⟩, ⟨ ř ⟩ and ⟨ ž ⟩, which replaced digraphs like ⟨ cz ⟩, ⟨ ie ⟩, ⟨ sch ⟩, ⟨ rz ⟩ and ⟨ zs ⟩; the "dot" above letters for strong accent, as well as the acute accent to mark long vowels ⟨ á ⟩, ⟨ é ⟩, ⟨ í ⟩, ⟨ ó ⟩, and ⟨ ú ⟩, in order to represent each phoneme by a single symbol. Some sources mention documented use of the special symbols in Bible translations (1462), the Schaffhausen Bible, and handwritten notes in the Bible. The symbol ⟨ ů ⟩ (instead of ⟨ uo ⟩) came later. The book Orthographia Bohemica (1406) was attributed to Hus by František Palacký, but it is possible that it was compiled by another author from Charles University.