Duolingo PT from EN versions:

Trees:
v0: 2012-06-01, ? (Beta)
v0: 2012-10-30, ? (Beta)
v1: 2013-02-02, , 91 Skills (91 Different lessons)

Paths:
1.0: 2022-09-10, 91 Skills (91 Different lessons) (75 Units)
1.1: 2023-09-10, 91 Skills and 99 Stories = 190 Different lessons (60 Units)
1.2: 2024-05-01, 91 Skills and 99 Stories = 190 Different Lessons (104 units)


tree_pt_en_v1_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.