André Bargull

> 2\. `k` and `K` do not appear in allowed cycles. `hb` and `hB` do, but I don't find a spec explaining what they mean. Japan has `K` → https://github.com/unicode-org/cldr/blob/343bde9e7e8d6cf6f2c57e257fa4f074df970311/common/supplemental/supplementalData.xml#L4888...

> Oops. I missed that. So: `K` is allowed in one locale but isn't the default anywhere and `k` is specced for completeness and isn't in use anywhere? Yes. `K`...

> Just so that I understand the feasibility of hard-coded special cases if this issue isn't addressed in ICU4X itself: It would be possible for ECMA-402 implementation glue code to...