** Shares of the language learning platform Duolingo <DUOL.O> fall about 2% to $322.24

** Jefferies cut price target on stock to $325 from $400, citing continued slowdown in user growth and concerns over the company’s long-term growth trajectory

** Says daily active users on the app grew 25% in September, down from 42% growth in June

** Brokerage notes slight pickup in the second half of September, driven by new viral social media content

** Average rating of 27 analysts is "buy"; median PT is $437.50 — data compiled by LSEG

** Stock up 14.4% in last 12 months, including session's move

(Reporting by Sanskriti Shekhar)

((Sanskriti.Shekhar@thomsonreuters.com))