> I think any projects that are run by people that see themselves as "X-people" (like Python-people, Perl-people) always have a bit "ick" reaction to new languages being added to projects they might see as part of a language's community.
I would say that Pythonistas are quite accustomed to "(other) languages being added" to the Python ecosystem. After all, NumPy relies on Fortran, as well as C.
Asserting that kind of "ownership" over code seems rather distasteful to me. Maybe there would be less acrimony if developers got paid for it somehow.
Yeah, maybe Python was a bad example, didn't really think specifically about the languages I made as examples, they were just examples with the hope of making it easier to understand what exactly I was talking about.
Some communities indeed are better at embracing multiple languages, Python, JavaScript and Java/JVM comes to mind, where it isn't uncommon to call out to other languages.