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A comment on Luis von Ahn, co-founder and CEO of Duolingo. Parent comment

Re:Luis von Ahn, co-founder and CEO of Duolingo by noname120 on Monday January 27, 2020 @08:01AM (#22158848)
Conversely, there is this to train tone pronunciation. :)

https://mandarintonetrainer.com/games

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Re:Luis von Ahn, co-founder and CEO of Duolingo by nmfisher on Monday January 27, 2020 @08:08AM (#22158885)
Yes, I have come across that one too! Acoustically speaking, tones are actually really interesting. Are you associated with that site?
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Re:Luis von Ahn, co-founder and CEO of Duolingo by noname120 on Monday January 27, 2020 @09:18AM (#22159398)
No I'm not. I always disclose it when I'm associated with anything that I promote.
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