I thought this question had already come up in Area51 but I cannot see it here so I am duplicating it.
Are questions about how to build and manage a programming language community on-topic here or should they be redirected to, for example, community building?
On the one hand programming languages are a unique kind of community on the other so are many other kinds of community.
Copying my answer from area 51 here
These questions would be better suited for community building stack exchange
Managing a programming language community is not related to the technical design and implementation. I would not consider these on-topic.
Ask yourself: who are the experts?
If the experts are computer scientists or compiler/library implementers, and the community building aspect is not generalizable to other types of communities, ask here.
If the experts are community building experts, don't ask here (but try Community Building Stack Exchange).
For example, lessons learned from [a specific aspect of] the C++ community calls from answers from people who are familiar with how the C++ committee works. They are more likely to be language designers and implementers who are not particularly interested in community building in general, than community building experts who don't know about C++. So this is a suitable site.
On the other hand, questions such as inviting open-source participation, maintaining discussion channels, and so on, that could equally apply to many other topics, are off-topic here because this site doesn't have the expertise.
