One note in the chapter: Here it is explained cid taught them about steam. In the anime however, steam trains are a regularly occuring scene. Are they having a brain fart or are the trains using a different form of propulsion?
I honestly prefer the official translation of ¨Tuna King", but I do agree McRonald makes a lot of sense in this regard. It shows better that Cid did base the name off of his own world.