デュオリンゴ Duolingo GenshinXDuolingo
A language-learning app publicly released in June 2012, featuring multiple courses.

In July 2024, there was a collaboration between Duolingo and [[Genshin Impact]], which had [[Duo (duolingo)|]] and [[Klee (genshin impact)|]] as friends.

h4. Characters
* [[Duo (duolingo)|]] (the service's main mascot)
* [[Lily (duolingo)|]]
* [[Zari (Duolingo)|]]
* [[Bea (Duolingo)|]]
* [[Junior (Duolingo)|]]
* [[Oscar (Duolingo)|]]
duolingo