Not that I love Duolingo, but isn't that copyright infringement? Are this "notes" simply copied from the app?
https://duome.eu/blog/16.04.2018
> Durung the past few weeks I have been talking to Severin Hacker, the co-founder and CTO of Duolingo. To make a long story short: they do like the idea, but they need to own the domain [context for HN: original domain was duolingo.eu] and they're going to redirect it to duolingo.com so the old forum links will stop working in a couple of weeks from now.
I specifically framed it that way so that the WELL AKSHUALLY crowd wouldn't say what you just said.
And your parent comment specifically framed it to ask whether it is, not whether it "should" be, so the response to you was hardly a "well ackshually."