How Current is Duolingo?
Hey, just wondering to all moderators and who knows, when was Duolingo last updated?
Duo is continually being updated with A/B tests. The Android and iOS apps get updated regularly although other apps like the Microsoft mobile app and the Kindle app are not supported to the same level.
Individual languages are updated somewhat randomly - i.e. when the course contributors are willing and able to do it. Updates can be relatively minor or massive. (The reverse Spanish tree added approximately 24 new units a few months ago.) The course contributors also swap out some of the sentences from time to time.