I have found that working with llms for frontend to be better than most of the developers I have worked with. A majority of devs I came across only had enough frontend knowledge to be dangerous and to consistently introduce frontend entropy.
The Ghibli generated character and logo makes me feel like this is a vibe coded project. I know Duolingo has become more ai-first, but at least they put some effort into the branding and styling of the content.
This seems like a surefire way to build a private echo chamber. I doubt a simulated audience is going to challenge your thoughts or help find what you are trying to say.
My brother is Christ, call BS all you WANT. This is T9-esque and we have comments in here being interested in going away from full keyboards on their phones in favor of cramming multiple letters onto buttons and letting the software do it again. Time is a flat circle and all that.