It is French and very highly flavoured.

I daresay you wouldn't understand it, dear," said Violet.

"You're such an _ingenue_." Olga made a grimace.

"I'd rather not understand some things," she said bluntly.
Violet uttered a low laugh.

"Dear child, you are so unsophisticated! When are you going to grow up ?" "I am grown up," said Olga.