It’s all Greek (or something) to him.

Me, after catching up to Tyler, who ran all the way from his Kindergarten Enrichment class to our car:  “Look at you, running like the wind with that backpack bounding behind you!”

Tyler:  “It wasn’t bounding.  It was jumping.”

Me:  “Yes, but ‘bounding’ is another word for ‘jumping.’”

Tyler:  “Oh.  Well, I don’t speak Spanish.”