Old Georgian was a literary language of the Georgian monarchies attested from the 5th century. The language remains in use as the liturgical language of the Georgian Orthodox Church and for the most part is still intelligible. Spoken Old Georgian gave way to what is classified as Middle Georgian in the 11th century, which in turn developed into the modern Georgian language in the 18th century.

Literary language is the form (register) of a language used when writing in a formal, academic, or particularly polite tone; when speaking or writing in such a tone, it can also be known as formal language. It may be the standardized variety of a language. It can sometimes differ noticeably from the various spoken lects, but the difference between literary and non-literary forms is greater in some languages than in others. If there is a strong divergence between a written form and the spoken vernacular, the language is said to exhibit diglossia.