Nibbles sings the song "Alouette" while he is making a sandwich. The song is French-Canadian, not French, and was not published until the latter half of the 19th century, well after the 18th-century setting of this cartoon, making this anachronistic as well.
The plot takes place during the reign of King Louis XIII in the mid-seventeenth century. However, a guillotine, which was not invented until 1791 and first used on 25 April 1792, is used at the end of the film.