Sooo, now Koreans will learn even less about the rest of the world and probably still say ‘lunchee’
Sadly, I suspect this won’t work so well in the ‘real world’ with normal students. If the education system says you can’t fail a student, then they will just ignore the bot (or make fun/goof around with it) just as much as they do with the current English teachers. A robot will not change kids attitudes. Sure it’ll entertain them for a bit but it won’t change their learning habits if they don’t have a fear of failure.