Of course, only you'd be better using "well" although I don't know where things stand now. Now, if you ask: today,"How are you?" the answer could easily be: "I am good." but back in the day we were taught to say: "I am well." because "good" meant you are of "good character" not "health". How, is it in your parts? We chose to use the traditional: "well" for "health" so this would be: "My shoulder is well..." Let me know what the evolution of that phrase is, please?
Ah interesting, lets excavate a little. " How are you, I am well", not "I am good" but " my health is good" not " my health is well" " I am well but my shoulder is not good" meaning it does not work well. I would never say " my shoulder is well". I would not say "Is your shoulder fine" I would say " " How is your shoulder" and the answer would likely be either " It's fine" or " Its good" the first would be closer to an abstract answer relating to feelings the second more physical describing the state of the shoulder. Whew, It's not easy to be all-inclusive! :-))
To me "Is your shoulder well?" would imply that it had previously been in a poor state of some sort and you're asking if it has recovered. "Is your shoulder ok/alright?" would be the go to options if the question is being asked subsequent to an event that might give one cause to think otherwise; these would also serve if the question is to ascertain whether the shoulder concerned is up to the task immediately at hand (lifting a couch or whatnot). "Good" would also serve in this instance, but would be redolent of slang, and I wouldn't inherently expect Duo to accept it. "Is your shoulder fine?" doesn't strike me as particularly natural for any of these instances. I guess maybe it could be used in the first, but it would sound quite a bit less "elegant" than the already informal "ok."
So the question: to which of the three instances does the Greek question apply?
Since the Gr. is the original and "καλά" is an adverb one would lean toward "well" which I avoided and chose "fine" we do have "OK" as an alternative. I made an effort to change the Gr to "καλύτεραρ" (better) which would have resolved the issue but it wasn't feasible. Thanks for the input and clear explanation.
Please see the following comments which negate some of what's stated here. "I am good." is now accepted as correct when referring to our health and we thank piguy3.
Exactly, as Dimitra says. We should say: "I am well." when referring to our health and "I am good." when referring to the kind of person we are.
However, there is some tendency for some people to use "good" for both. That's not correct.
It's looks like the dictionary editors don't really agree:
see "Good vs. Well: Usage Guide" the "Adjective" section addresses your point; the "Adverb" section addresses Dimitra's (maybe, it doesn't seem to me that the question of good as adverb arises in this sentence; whatever word goes after "shoulder," it's grammatically an adjective)