The phrase "a vernacular form" is correct and usable in written English.
It can be used to refer to a style of language or expression that is characteristic of a particular region or group, often informal or colloquial.
Example: "The author chose to write in a vernacular form to better connect with the local audience and reflect their everyday speech."
Alternatives: "a colloquial style" or "an informal expression".
Ebonics is a vernacular form of American English used in the home or for day-to-day communication rather than for formal occasions.
The modern name, Angkor Wat, means "Temple City" or "City of Temples" in Khmer; Angkor, meaning "city" or "capital city", is a vernacular form of the word nokor, which comes from the Sanskrit word nagara.
There is a vernacular forming around information overload.
A self-described "non-techy guy," Kutiman had tapped into an online cultural practice that has become a distinct vernacular form.
Comic books are what novels used to be -- an accessible, vernacular form with mass appeal -- and if the highbrows are right, they're a form perfectly suited to our dumbed-down culture and collective attention deficit.
"It's a vernacular art form made, to some extent, by the people and for the people.
The first is about the glories (as the collective sees it) of the early days of graffiti and the invention of a vernacular art form that has swept the world.
Traditional storytelling remains a much-admired art form, and Emirati culture, like Arab culture on the whole, esteems poetry, whether it is classical, contemporary, or the Bedouin vernacular form called nabaṭī.
The vernacular form and physical pattern of settlements in Saudi Arabia evolved under the influence of visible and non-visible forces.
Linguistically, the state spreads across the Central, East-Central, and Eastern zones of the Indo-Aryan languages, the major native languages of the state being Awadhi, Bhojpuri, Bundeli, Braj Bhasha, Kannauji and the vernacular form of Khariboli.
After revolutionizing architecture with the cool machine imagery of his starkly cubic, white, ornament-free buildings of the 1920's, he turned increasingly to a vocabulary of vernacular forms and natural materials that evoked the folkloric influences of his childhood home.
