The phrase "plain prose" is correct and can be used in written English.
You can use this phrase to refer to writing that is clear and straightforward, without any flowery language or embellishment. For example, "The instructions were written in plain prose, so it was easy to understand."
Anyone, however, can learn to write clear, plain prose.
Highsmith wrote in plain prose, like a business report.
Grossman's deliberately plain prose has an extraordinary imaginative power.
In beautifully plain prose, she surveys her long life in moments ordered not chronologically but emotionally.
The transporting pleasures of Wilbur's rhymes trotting in step with Bernstein's music find no equivalent in plain prose.
In literature the rational impulse fostered satire, argument, wit, plain prose; the other inspired the psychological novel and the poetry of the sublime.
Using plain, spare prose, her narratives often unfurl from multiple perspectives, resulting in exquisitely elliptical story lines.
Yaccarino's book, written for slightly older children than "Manfish," has the plainer prose, dotted with the Captain's aphorisms: "We protect what we love".
Through details like these, the book transports readers well away from the plainer prose and less ornate sartorial styles of our own times.
Books followed at a clip, whether embracing the twin concerns of archaeology and extra-terrestrial life, as in Journal from Ellipsia (1965), or the plainer prose of Textures of Life (1963), which tells of a Manhattan couple who, through their troubles, bring together those of an older generation.
Angell uses plain, graceful prose to tell the complex tale of Cone's season without ever falling into glib psychobabble or wormy sentimentality.
