The liberal sprinkling of "Franglais" in this cartoon makes for some good laughs, especially the two painters' discussion of that afternoon's race favorites.
The French Foreign Legion, a famous unit of the French army, was founded in 1831 and still accepts recruits in 2023. It has been the subject of many novels and film productions.
Uncle Francois is a spoof of the famous U. S. poster recruiter, Uncle Sam (who wants YOU!).
All the written French (on the paint bucket, on the door etc.) is wrong. Not only misspelled, but also grammatically inaccurate and nonsensical. This is most likely done on purpose. You think so genius.