Argot (noun)
ah-go
The jargon or slang of a particular group or class.
Mid 19th century (originally denoting the jargon or slang of criminals): from French, of unknown origin.
Example sentences
“The trouble was, she could barely understand the teen argot they spoke.”

Soigné (adj) swahn-yay Carefully or elegantly done, operated, or designed First recorded in 1915–20. Borrowed directly from French; originally from soin, meaning “care.” (more…)