Katharevousa

‘You read the poetry of Cavafy, I have taught you to speak Katharevousa and Italian.’

Source: wiktionary

A year later, after much deliberation and public discussion, an act of parliament established that demotic Greek was to replace the hybrid katharevousa as the official language of education – and therefore, in practice, in most walks of life (exceptions are the Church and law).

Source: wiktionary