Thank you for the information about language settings! Maybe this will help others as well. And, ideally, the script would work in any language.
Regarding a tutorial, you are not the first person to ask for that. I'd hoped someone would make such a tutorial. For now, here's a start. I'll add to this as more users share their experiences here.
http://bee-cave-games.github.io/blog/2016/02/14/after-effects-to-spine-tutorial