Some people call it "a baguette". I doubt they know the meaning. I don't know either. Is it a French word?
It is a French word. It means small stick. It is a typical white crispy French bread. Some might be quite long. Maybe you saw them in a movie.
About Spaghetti (Napoletana Japanese style) with Ketchup... are you sure it isn't a simple tomato sauce (an onion, some tomatos, herbs, salt, cooked a very long time: the longer the better)? Ketchup has tomatos, lots of sugar and vinegar in it!