There's a new "data visualization society" slack channel. Not sure what it's about, and I'm reluctant to join another crowded Slack. Slack isn't a good medium for group discussions, I think... https://medium.com/data-visualization-society/introducing-the-data-visualization-society-d13d42ab0bec
vis.social is an open social platform for creative people, especially anyone in sciArt, data, visualization, creative coding, and related arts and research. English is the common language of the instance.