Duolingo SW from EN versions:

Trees:
v0: 2015-10-30, ? (Beta)
v0: 2017-02-20, ? (Beta)
v1: 2018-02-03, ?
v2: ?
v3: ?
v4: ?, 65 Skills (65 Different lessons)

Paths:
1.0: 2022-09-10, 65 Skills (65 Different lessons) (42 Units)
2.0: 2023-02-20, 73 Skills (73 Different lessons) (47 Units)
2.1: 2023-09-10, 73 Skills (73 Different lessons) (48 Units)
2.2: 2024-05-01, 73 Skills (73 Different Lessons) (83 units)


tree_sw_en_v1_experiment
tree_sw_en_v2_experiment
tree_sw_en_v3_experiment
tree_sw_en_v4_experiment

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, 2024-05-02.