Mongolian Letter Cha with Two Dots

Mongolian Letter Cha with Two Dots at U+1878 is a letter of the Mongolian script used for a dotted cha sound in texts that require the extended Mongolian repertoire. It is encoded in the Mongolian block, which covers traditional vertical Mongolian writing along with related usage for Manchu, Sibe, Todo, and other historical or minority orthographies. In practice, this character is mainly encountered in specialist Mongolian-script text processing, dictionaries, language documentation, and scholarly editions where the exact extended letter matters. It may be used to write or transcribe sounds not covered by the basic Mongolian cha, especially in materials dealing with nonstandard, historical, or related Mongolic and Tungusic writing traditions. Because traditional Mongolian letters change shape by position in a word and are normally laid out vertically, its appearance depends heavily on shaping support in the font and text engine. A plain fallback font or unshaped environment may display it poorly, so it is most reliable in software designed for Mongolian-script typography.