Maurice Grevisse

Standard French (in French: le français standard, le français normé, le français neutre 'Neutral French' or le français international 'International French') is an unofficial term for a standard variety of the French language. It is a set of spoken and written formal varieties used by the educated francophones of several nations around the world.

As French is a pluricentric language, Standard French encompasses various linguistic norms (consisting of prescribed usage). The syntax, morphology, and orthography of Standard French are explained in various works on grammar and style such as the Bescherelle, a reference summary of verb conjugations first compiled in the 19th century by Louis-Nicolas Bescherelle from France, and Le Bon Usage written in the 20th century by Belgian grammarian Maurice Grevisse.

Le Bon Usage (French pronunciation: [lə bɔn‿yzaʒ], Correct Usage), informally called Le Grevisse, is a descriptive book about French grammar first published in 1936 by Maurice Grevisse, and periodically revised since. It describes the usage of the French language, primarily in its written literary form.