Apparently there is a "Default community-specific close reason", which for our site is
This question does not appear to be about the Japanese language within the scope defined in the help center.
However, once a community has their own community-specific close reasons, only they are displayed (together with the migration option, or a custom close reason). There is a maximum of 3 for these community-specific close reasons, and we're already running 3, namely close reasons for
- translation questions
Questions asking for translations, transcriptions or proofreading are off-topic unless prior research effort is clearly indicated; we're here to help you learn, not to provide a bulk translation service nor to proofread your translations or transcriptions. See: We don't do translations.
- typo questions
This question was caused by a simple spelling mistake, misreading, or typographical error. While similar questions may be on-topic here, this one was resolved in a manner unlikely to help future readers. For more information, see our meta discussion on "typo questions".
- resource questions
Questions seeking resources or advice about learning Japanese are off-topic here, but you may find our list of resources for learning Japanese helpful.
I agree that a "this isn't even a question about Japanese" close reason is still quite common (for example we often get questions about Chinese), and I think it would make sense to add this as a fourth standard close reason, but for this to happen we'd have to take this to Meta for a network-wide change, or ask for adding an exception just for our site...
Maybe it makes sense to combine several close reasons into one, for example something like
This question is beyond the scope of our site, because it might be asking for resources or technical setup, it might be caused by a spelling mistake, or it might simply turn out not to be related to the Japanese language at all. See What topics can I ask about here?
Since these questions are really just off-topic it could make sense to combine the close reasons, since they don't need to give specific advice on improving the question for reopening.