▪ the ability to speak or write a foreign language easily and accurately: "fluency in Spanish is essential"Similararticulacyfacilityability to speak or write … easily and accuratelycommand of
Property of a person or of a system that delivers information quickly and with expertise
Fluency refers to continuity, smoothness, rate, and effort in speech production. It is also used to characterize language production, language ability or language proficiency. Wikipedia