Just to state the obvious first, vocabulary is our second-most popular tag, so clearly some vocabulary questions are fine! However, on-topic currently asks users to avoid:
- Simple general reference questions and character
recognition requests that can be answered by a resource such as a
dictionary (although requests for help and clarification after
consulting a resource may be acceptable)
But it also says that the following questions are allowed:
- Specific problems encountered when learning Korean appropriate usage of language in real-life contexts
- how to express an idea in idiomatic Korean
- the meanings of Korean words or expressions where not clear from dictionary definitions
Taking all of those together, I'd summarise it as: If you're asking a question that looks like it could be answered just by using a dictionary, it has to be clear what the particular 'angle' is that makes the question more interesting than just 'what is the Korean for the word xxx?'.
For example -
- The fact that you noticed that that terms for parts of the foot vary (you mentioned this above, but I'm not sure it was stated in the actual question)
- wondering if there's some easy way to learn parts of the foot
- wondering if names for parts of the foot relate to names for parts of the hand
etc... any of those additional perspectives could elevate the question beyond a simple reference question.
The current answer to the question is good, partly because it has considered some angles that a dictionary wouldn't give. But perhaps it's true that the question as initially worded could have been clearer at presenting those possible angles - sometimes asking a question too straightforwardly can leave other users guessing a bit at what's really being asked.