Actually I think those bullet points align quite closely to how I see Cldr.LanguageTag.t.
- The information conveyed is lossless in the “code” output - and there are 100s of validation tests to ensure that’s guaranteed.
- I don’t really expect people to be digging into the fields - and the structure has definitely changed over time, but slowly and not frequently
- It’s a type that is self-sufficient and not expected to be subdivided.
Therefore its more closely aligned to Decimal.t than MapSet.t in my mind,
