Katharevousa is a conservative form of the Modern Greek language conceived in the late 18th century as both a literary language and a compromise between Ancient Greek and the contemporary vernacular,
Adamantios Korais, the conceiver of Katharevousa
The station board of Hapur Junction railway station in North India demonstrating digraphia of two formal registers, Hindi and Urdu, of a common vernacular, Hindustani, an example of triglossia