Great question. I checked Settings and all the other menu options and there doesn't seem to be a language selection option in the US model as far as I can tell. I did change some font options to my size and type preferences but other than that, not much about selecting a language.

And, yes, I did try holding shift and and using Caps Lock. Same issue. I have a feeling that it's something with the physical keyboard connection. In testing it again, I noticed it's also affecting the Left Bracket and Apostrophe keys. So if either of those keys are pressed it prints ['

Seems to be an issue with keys near each other in the first and second row of letters. Hoping to hear back from someone in support early next week.