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A comment on Duolingo reaches $6.5B valuation on day of IPO. Parent comment

Re:Duolingo reaches $6.5B valuation on day of IPO by minton on Thursday July 29, 2021 @09:12AM (#27996111)
If you search, you’ll find plenty of people willing to sell you some “FSI” courses for hundreds of dollars. Is there an official source for FSI courses?
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Re:Duolingo reaches $6.5B valuation on day of IPO by harblcat on Thursday July 29, 2021 @09:28AM (#27996281)
It looks like https://www.fsi-language-courses.org/ is what you want.
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