The adopted norm may of course(as in the case of the epistolary novel) become a literary norm or a convention in itself.
Maltese, spoken on the island of Malta, is the only dialect to have established itself as a fully separate language, with independent literary norms.
In the early 19th century, Vuk Stefanović Karadžić, promoted the spoken language of the people as a literary norm.
It is a highly standardized language, with the first attempts to establish literary and linguistic norms dating back to the 5th century.
The permanent dialogue between "I and the Other" she is moving everything that is "fixed" in "mobile" creating "new ethic" within the traditional literary norms.
By the sixteenth century Middle Scots had established orthographic and literary norms largely independent of those developing in England.
Such writers established a new cross-dialect literary norm.
Sometimes the term usus implies particular norms differing from literary norm (e.g. professional or social norms).
It has preserved several ancient features, remaining more consistent with the literary norm, while at the same time developing a few innovations.
Since the 20th century, however, people have started to identify themselves with their spoken vernacular and conform to the literary norms set by academics.