Thanks for the suggestions, appreciated! For some context, this snippet is just an educational demo to show what can be done with regard to structured output &

Thanks for the suggestions, appreciated! For some context, this snippet is just an educational demo to show what can be done with regard to structured output & data types validation. Re 1: for more advanced cases (using the exact same stack), I am using ensemble techniques & automated comparisons to double-check, and so far this has really well protected the app from hallucinations. I am definitely careful with this (but point well taken). 2/3: agreed overall! Apart from this example, I am using French only where it make sense. It make sense when the target is directly French students, for instance, or when the domain model (e.g. French literature) makes it really relevant (and translating would be worst than directly using French).