Duolingo EN from ZH, versions:

English B2	130	ZH	990	19.7	8225	1115	25.12	3442
English B2	130	ZH	990	19.7	7855	707	25.09	2760
English B2	ZH	290	Rad	7724	367		25.01	1921
English B1	ZH	147		2942	152	3333	24.05	299
English B2	ZH	331	2185	7225	371	6188	24.03	695
English B2	ZH	205	2174	8562	376	6217	23.11	679
English B1	ZH	96	995	4062	144	3333	24.02	291
English B1	Chinese	139	1214	4805	195	5167
English B1	Chinese	122	1063	4235	166	4722
English	Chinese	882	147	715	4722
English	Chinese	576	96	378	2702

2025-07-09:
Yesterday, Duolingo added internal "CEFR" tags to almost all courses, while standardizing their structure (approx: 10+30+30+60+50+50+x).

[2023-Sep]:
- New paths:
  EN from ZH 108 (B1)

[2023-Aug]:
  EN from ZH 139 (B1)

[2023-February]:
- Corrected: EN from ZH 122 units
  has 166 stories, not 165.

Editor: Mat!/Ozone, 2026/03/22.