I just found Am I allowed to make a Stack Overflow clone? which answers most of my question below (yes, look & feel (or method of operation) is not copyrightable).
However, I don't know where the line would be drawn for text. Obviously, large blocks of text like the Terms of Service, Code of Conduct, etc. are copyright and can't be reused. But what about labels such as "Ask a question" or "Suggest improvement"? There are only so many way of saying these.
What portions of the Stack Exchange network's text can be reused by non-SE sites and what can't?
Note: what I want is a customised version of Stack Exchange, so Enterprise and Teams wouldn't work for me anyway, aside from the cost.
Original question - ignore, for background information only
I saw this question: Is Stack Exchange / Stack Overflow available for private or internal use? and the link seems to indicate only Enterprise is an option, with price available on demand via the sales team.
I have a future project in mind where I would like to use a customised version of the Stack Exchange model (or something very similar), i.e. any member of the public can create an account and participate in order to ask questions and get high quality answers.
Note: I have tagged this question with support, not discussion, because I need a concrete answer, and not discussion. I am also not looking for recommendations for pre-existing clone software because I have already seen Stack Exchange clones.