My point of views on your points:
Well, there are sub-Discourses which are not languages. The default language of the main forum is English, and this can be extended there. Many of the resources people will be sharing would present themselves in English, but most of them will be multi-lingual already.
It can just be me, but actually, I don’t know any good resource for things like that, and existing information is distributed (you might say Huggingface, but it is so different). I usually find myself fishing some libraries/tools on the web or github, or just ask in some chat, to not search for America again, for stuff like multi-lingual stemmers, web scraping for language models etc. Some of them are also behind paywalls
If there already is such a place, please let me know
Might be, but it is mostly for programmers, nothing on the science or AI…
The problem is: People are working on the datasets and want to do something with them, see something working, do something with it and even show their community that their efforts are worthwhile (it was the driving force behind the voice-chess). The “showroom & resources” idea was to fulfill this need. See something done in X language and use resources to do similar in their language. As this is a forum, people can talk about the projects/resources, shortcomings, good parts, how to make them better, alternatives etc.
Of course, everybody else can be much more knowledgable and might not need these