Oh, yeah, Duolingo also suddenly decided to start reviewing my submissions (I don't even know if that still exists) as to additional correct translations of their sentences. I'm pretty sure it's for a course I completed at least 3 years ago (Spanish)... I mean, better late than never, but their "please keep it up" has never been more futile... Actually, 4 years ago... I feel old... Oh how recently did Spanish feel like a hip new thing...