Korean has climbed up the global rankings of the most popular languages studied on Duolingo in 2023, the company revealed in its annual report published on Monday. Up the ranks: Korean has switched places with Italian to take the No. 6 spot among the top languages studied on the learning platform this year. A youth favorite: In a study published in September, Duolingo reported that Korean is more popular among younger learners ages 13 to 22 in several countries, including the United States and the United Kingdom.