Duolingo Yiddish, released in April 2021, is an online Yiddish course encompassing 70 sections called “skills,” with each skill featuring five levels. The 350 levels have three to six lessons each. With every lesson requiring at least five to seven minutes, the roughly 1,300 lessons will take a minimum of 250 hours for the average student to complete. The site itself appears to be available in numerous languages.
Read a description and review of Duolingo Yiddish by The Forward‘s Jordan Kutzik.