Wyatt Oleff, who plays young Rumpelstiltskin, was born and raised in Illinois and naturally speaks with an American accent.
Malcolm trying to fly and falling flat on his face is very similar to a scene in the movie Hook when a grown up Peter Pan played by Robin Williams first tries to fly and lands flat on his face.
Young Rumple's accent comes and goes. In certain parts he speaks without a Scottish accent.
The title after a quote from Peter Pan in J.M. Barrie's original story explaining how to fly: "You just think lovely wonderful thoughts."
Malcolm's and Pan's accents are completely different. Malcolms accent is more working class and Pan's is a higher-class accent even though they are the same person.