Duolingo is more than just a beneficial tool for those wanting to pick up a new language. It has also become popular with language aficionados. However, regrettably, it seems that even this beloved platform also falls victim to the notorious Rule 34 principle.
Numerous individuals discovered that Duolinger + rule 34 fusion exist. It could come as a surprise, but apparently, there are actually fan-made illustrations based on characters from Duolingo that abide by the infamous rule which states that "if it exists, there is porn of it."

Duolingo Rule 34 Hentai