The course teaches English-speaking users the hiragana syllabary in addition to Japanese phrases, with katakana cards being available on the company’s Tinycards app.
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Duolingo called the course “the most highly anticipated course launch in our five-year history.” The language app first teased the release of the Japanese course last month, with a very positive response on both Facebook and Twitter:
— Duolingo (@duolingo) April 20, 2017
With the inclusion of Japanese, Duolingo raises the number of language courses available to English-speaking users to 23 — 28 if you count the other courses still in development, such as Klingon.