I have a handy tip for you all and I share simply because I'm a giver; I want to spread my hard-won wisdom across the world:
If you ever come across any actual Swedes, don't say to them “oh, hey! I can speak Swedish” and then start talking like the Swedish Chef: “yang borshpear de yoom bedishkidoo yaybo de hrday der hmm bork bork bork!” They don't take kindly to it.