"Rødgrød med fløde" is a phrase I already know I could never speak correctly. It sounds like a Japanese woman saying it, and the sound does not reflect the letters, in my understanding at least.

I expected "höyryjyrä" to be extremely difficult to say, but hearing it several times, I think I could say it fairly well.

I wonder what sounds are difficult for which people. For instance, I know Japanese have difficulty with "R"... "rest" tends to sound like "west".