The X account Sports Scran shares this photo from a soccer stadium in Nuuk, Greenland. That chilly island is currently under Danish rule, so it's not surprisng that Danish foods can be found there.
Scandi Baking tells us that, in Denmark, a Fransk hot dog begins with a roll that is hollowed out. It is then filled with sauces and a sausage is then stuffed inside.
Do the French have something they call a Danish hot dog? I can't find out information on the topic. But there is a hot dog variety is is commonly called a "sausage wagon." It's an open-faced hot dog with pickles and a remoulade sauce.
If you visit the Gothenburg main bus station, attached to the main train station, then visit Sausage Haus for their French hot dog - or try one of the others, like an Italian lamb chorizo.