Who was one of France's best vernacular writers?

Alighieri

However, the writers of vernacular language, such as Dante, Geoffrey Chaucer and Mark Twain. Dante Alighieri, diverged from this tendency by writing in the language of ordinary people.

The purpose of using vernacular is to allow readers to understand the language of a work. It is important to connect to readers, and if the language being used isn't understood, this will not be possible. All books could be understood.

A French Romance Writer: Chrétien de Troyes

A French Author from the Enlightenment: Voltaire

The Grand Master of French Literature: Victor Hugo

The Founder of Realism in French Literature: Honoré de Balzac

George Sand: a Feminist French Author

A Swashbuckler in Verse: French Playwright Edmond Rostand

A Lyrical French Writer: Marcel Proust

A Political French Writer: Émile Zola

French Poet Charles Baudelaire

The Traveling French Writer: Gustave Flaubert

Explanation:

Each writes on their own distinct subject.