Two key lines in this movie have no intertitles, the viewer having to lip-read them. (At around one hour and four minutes) Kate reveals to Philip, "Philip, I am going to have a baby." Four minutes later, she reveals to her husband Pete, "I am going to have a baby."
Anny Ondra's character marries a sailor, played by Carl Brisson who was a former professional boxer. In an example of life mimicking art, just a few years later, Ondra would actually marry a professional boxer, Max Schmeling, the former Heavyweight Champion of the World, Adolf Hitler's favorite heavyweight.
A signatory on the fishermen's petition against steam trawlers is Jack Cox. Jack E. Cox was Sir Alfred Hitchcock's cameraman on this movie.
At the end of 2024, The Manxman (1929) will enter the public domain in the United States but only in its non-restored, scoreless form. It will remain copyrighted in the rest of the world until the end of 2050.