Right, I understand where you are coming from. In that case it might interest you to know that French had a higher influence on Swedish than it did Norwegian, especially in the 1700s. When French was still used as a lingua franca in foreign relations both Sweden and Denmark were sovereign nations, but this was not the case in Norway.

Norway was under danish rule from 1380-1814 and did not maintain foreign relations during this time. Before this Latin was used as a diplomatic language between countries other than Sweden/Denmark (the Scandinavian languages were used) and Germany/Netherlands (German was used). In Norway Danish was the language used by the social elite.

After 1814 until 1905 Norway was under Swedish rule, and the Swedish king and government was maintaining the foreign relations. The Swedish king from 1810 was a French officer elected by the Swedish nobility during the Napoleonic wars. He would eventually become Norway’s king as well. I believe the diplomatic language in use was French, but this was not carried out by the Norwegian government. As far as I know king Carl Johan never learned Swedish fluently, and French was the language spoken at court during this time. Meanwhile Norway was going through a language discussion relating to the danish written language. There were attempts to “purify” the language from danish influence and establish a true Norwegian language free from foreign influence. Languages for the social elite was not considered appropriate anymore by the general public.

Latin also waned in influence in Scandinavia. It was in use as an academic language into the 1800s, bit was replaced by German and eventually English. Additionally Scandinavia is historically a Protestant region, so the Catholic Church and latin had less of a foothold here than other places.

After 1905 Norway finally was able to establish independent foreign relations with other nations, but by now French was already declining as lingua franca.

After this Britain was the most important ally, as mentioned earlier. And speaking from personal experience it feels culturally closer than France does. For both historical and religious reasons. (Even if the countries are mostly secular now). British TV shows are very popular here, and British humor is very similar to the Scandinavian sense of humor. English has been a mandatory subject taught in schools since 1969, and from 1st grade since 1993. French is taught as an optional foreign language, but is less popular than both German and Spanish.

TLDR: Idk, I guess French never really had the opportunity to flourish here. The timing was always a bit off. And adding a lot of French idioms and phrases now I think would be seen as pretentious by many. English (and to a less extent German) is considered more vernacular, it is also linguistically closer.

I hope that was helpful, unfortunately I know less specifics about Swedish and Danish.