Language service Duolingo has just closed a US$45 million of Series D funding led by Google Capital with participation of existing investors at a valuation of US$470 million, raising the company’s total funding to US$83.3 million.

The company’s previous investors include Union Square Ventures, NEA, Kleiner Perkins Caufield & Byers, as well as individual investors of actor Ashton Kutcher and author Tim Ferriss.

Founded in June 2012 by reCAPTCHA inventor Luis von Ahn, Duolingo now claimed has gained more than 100 million users around the world by integrating gamification elements introduced for the learning process.

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Emma Lee

Emma Lee is Shanghai-based tech writer, covering startups and tech happenings in China and Asia in general. We are looking for stories related to tech and China. Reach her at lixin@technode.com.