Duolingo™ is not just a beneficial tool for those looking to grasp a new language. It also has become popular with language aficionados. However, unfortunately, it seems that even this beloved platform endures the infamous Rule 34 phenomenon.
Numerous individuals found that Duolinger + rule 34 union exist. It may come as a surprise, but evidently, there are indeed user-generated artwork based on characters of Duolingo that abide by the infamous rule stating that "if it exists, there is porn of it."

Duolingo Rule 34 Rule34HQcom