18
/
en
AIzaSyCYaC8UkdPkQKLFUmpasLV5eC3M802CrcA
1638734
130604
2

nov 30, 2011 - Duolingo private beta release

Added to timeline:

4 months ago
0
0
38
HSM 1

Date:

nov 30, 2011
Now
~ 7 years ago
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