So I think what I want to start with is purely region / appellation containment data. That way I can generate quizzes along the lines of "which of the following are appellations in the X region" or "which region is the X AOC in".
They have geojson shape files for all the appellations in Loire: https://github.com/OpenWines/Open-Data/tree/master/dept_44
Looks like French AOC/AOP and IGP data might be available here: https://www.data.gouv.fr/fr/datasets/aires-et-produits-aoc-aop-et-igp/
Related to this is whether there are shape files that define appellations. I haven't found anything yet.
A quick search revealed quite a bit of work on wine ontologies. Not yet sure how much of it would be applicable to, say, adaptive testing of region knowledge but I'm going to dive in over the coming months.
Thinking about studying for my Level 2 sommelier certification, I thought an ontology of wine regions and varietals would make sense (largely to drive learning tools).