What? This is a conversation partner that's available 24/7, this is the dream app for any language learner.
My only concern is how "correct" the tool or the AI is.
It is a fundamentally important property of society. We should not be afraid to even speak. Everyone has a different reality, mistakes are often highly relative. Richness of culture (and lack of political tyranny) comes from this interaction and lack of it is almost always bad.