From the same Wikipedia article:

"Danish

Rødgrød med fløde ("red pudding with cream") is known as a notoriously difficult phrase for non-Danish speakers to pronounce."


I tried the pronunciation of this "Rødgrød med fløde" with Google translation, and it really sounds difficult (to me). You know, select the language Danish, paste those words to the left window, and click on the loudspeaker image.