“Digraphia” signifies a situation in which a single language is written with two scripts. Perhaps the best-known instance of digraphia in the world today is that of Hindī-Urdū, which is essentially one language, but is called Hindī when written in the Devanāgarī script and Urdū when written in the Perso-Arabic script. In Chinese, digraphia is referred to as shuāngwénzhì 雙文制.

“Digraphia” is to be distinguished from “diglossia” (shuāngyǔ zhì 雙語制), which is the concurrent use of two different languages within a single population. A good example of diglossia would b…