In the little bear's room that Celestine finds her way into towards the beginning of the movie, there is a poster for the director's previous film A Town Called Panic (2009).
In the English version, the couple who owns the candy shop and the tooth shop, George and Lucienne, are played by real-life couple Nick Offerman and Megan Mullally.
In a few scenes where Celestine is drawing, she uses her left hand.