The complaints against Duolingo allege that the app uses images of same-sex couples and families in its teaching materials, which the complainants argue is a violation of Russia’s “gay propaganda” law.

The investigation into Duolingo is just the latest example of the Russian government’s strict crackdown on LGBTQ rights. Earlier this month, the Russian Supreme Court labeled the international LGBT movement as extremist and banned information on LGBTQ relationships for adults.

[Edit typo.]