That's not "150 new languages". That's 7 major languages (Spanish, French, etc), for which courses already existed (mostly in English), targeting the 28 languages for which their app is available.<p>So it's not a complete AI-developed course. They took (say) their Spanish course for English language learners, automatically translated the English into Chinese, and now they have a new Spanish-for-Chinese-speakers class.<p>That is much less surprising than my default read of the headline.<p>It will be interesting to see how well it works. Translation tools are pretty darn good, but far from perfect. Did they run it run the content past a person who speaks Chinese and Spanish fluently? Such people surely exist, but I suspect that there aren't all that many.