* Vernacular: This refers to the everyday language spoken by people in a particular region or social group. Authors writing in the vernacular use the language that is familiar and natural to their audience.
* Plain style: This refers to a simple, direct style of writing that avoids complex vocabulary and ornate language. Authors who write in plain style aim for clarity and accessibility.
* Realism: This literary movement emphasized depicting everyday life and common people in a realistic way. Authors writing in a realist style often use vernacular language and focus on the language of ordinary people.
* Naturalism: This movement emphasized scientific observation and social determinism, often depicting harsh realities of life and using language that reflects the struggles and hardships of the characters.
* Modernism: This movement rejected traditional forms and styles, often experimenting with language and using more colloquial and fragmented language.
The specific term you might be looking for depends on the context and the specific characteristics of the author's writing. For example, an author writing in the "common language" of the 19th century might be considered a realist or naturalist, while an author writing in the "common language" of the 21st century might be considered a modernist.
Ultimately, the best way to describe an author's use of language is to be specific about the characteristics of their writing style.