If you're going to adopt a distinctive manner of speech to give an NPC (or your PC) character and memorability, you really should go overboard with it.
Kermit: Well spotted, sheep.
Sheep: I had no idea paper was so delicious. No wonder it's forbidden.
Kermit: Just on memory marbles start, do not.
Luke: We need to find Yoda.
C-3PO: There he is!
Luke: No, we're looking for Yoda.
C-3PO: That's him!
Luke: But, you look so... different.
Kermit: Younger! Look younger I do!
Kermit: When effectively one hundred years old due to having accelerated growth after being born in a clone tank you are, look as good you will not! Hmmm!