Duolingo EN from HU, versions:

Trees:
v0: 2013-11-15  ? (Beta)
v0: 2014-01-08  ? (Beta)
v1: 2014-12-10, 55 skills (55 different lessons)

Paths:
1.0: 2022-09-01, 55 skills and 84 stories (139 different lessons) (49 units) 
1.1: 2023-09-10, 55 skills and 84 stories (139 different lessons) (36 units)
2.0: 2024-01-08, 222 skills and 323 stories (545 different lessons) (160 units) CEFR B1
3.0: 2024-03-10, 251 skills and 323 stories (574 different lessons) (263 units) CEFR B2
1.2: 2024-05-10, 55 skills and 83 stories (138 different lessons) (55 units) [Schools]
3.1: 2024-05-10, 251 skills and 323 stories (574 different lessons) (230 units) CEFR B2

JSON References and links:
tree_en_hu_b1_ch3_AMEE
tree_en_hu_b1_ch3_AMEE_v2
tree_en_hu_b1_ch3_AMEE_v3
tree_en_hu_b2_ch5_AMEE


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, 2024/05/23.