Langue (French, meaning "language") and parole (meaning "speech") are linguistic terms used by Ferdinand de Saussure. Langue describes linguistic competence as a system of conventions and rules, while parole describes linguistic performance or language production in use.
Ferdinand de Saussure (pronounced [f??dinɑ? d? so?sy??]) (November 26, 1857 – February 22, 1913) was a Swiss linguist whose ideas laid a foundation for many significant developments in linguistics in the 20th century. Saussure is widely considered the 'father' of 20th-century linguistics, and his ideas have had a monumental impact on literary and cultural theory and interpretation.