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EMPLOYEE BENEFIT PLAN	6 Months Ended
EMPLOYEE BENEFIT PLAN	Jun. 30, 2025
Postemployment Benefits [Abstract]
EMPLOYEE BENEFIT PLAN	EMPLOYEE BENEFIT PLAN The Company sponsors a profit sharing plan with a 401(k) feature, the Duolingo Retirement Plan (the “Plan”), for eligible employees. The current Plan, effective January 1, 2021, provides for Company safe harbor matching contributions of 100% of the first 4% of the employees’ elective deferrals and 50% of the next 2%, with vesting starting upon the first day of employment. The Company also has the option to make discretionary matching or profit sharing contributions. The Company made safe harbor matching contributions of approximately $2,060 and $1,705 during the three months ended June 30, 2025 and 2024, respectively, and $4,029 and $3,288 during the six months ended June 30, 2025 and 2024, respectively. The Company did not make any discretionary matching or profit sharing contributions during the three and six months ended June 30, 2025 or 2024.