I wonder how I would fare if I were plunked down in Sweden for a while (say, half a year or more).
I understand a little Swedish, at least in writing, and I've been known to fake speaking/writing Swedish myself, but I have little formal knowledge—I just go by the bits and pieces I picked up (or half-remembered snippets thereof) and some educated guessed what the cognate of a German or English word might be. I wonder how quickly I'd acquire the language (with or without formal instruction).
And relatedly: I wonder how I'd do in Denmark or Norway, since for some reason, most of my exposure to "Scandinavian" has been to Swedish. (I presume Faeroese or Icelandic would be right out in terms of my being able to understand much of anything.)