It doesn't know that it knows #Norwegian. If you type Norwegian into the #DeepL website, it gives a pretty accurate #translation but says it's translated "from dansk". When I've tried, anyway. That's with #bokmål, though. I don't know whether it copes with #nynorsk and written-down spoken #dialects.

[Insert standard explanation of the difference between nynorsk and bokmål, and either a glowing appreciation of Ivar #Aasen's achievement, or horror at anyone managing to be so single-minded.]