Duolingo EN from EN versions:

Path Versions, all CEFR:
1.0: 2024-05-01: 196 Skills (196 Different Lessons) (CEFR B2) (200 Units)

https://liuch.github.io/duolingo_courses_overview/
https://duolingo.fandom.com/wiki/Course_list
https://duolingodata.com/
https://duolingodata.com/oldtable.html
https://ardslot.com/duolingocrowns.html

Edited by Mat!/Ozone, 2024-05-01.