Private-use codes Q…, X…

[Crissov]

XK for Kosovo has been added. It’s being used by CLDR/Unicode, IMF and some others. There are some other private use alpha-2 codes that are (or could be) associated with flags within some implementations of ISO 3166-1. What are the criteria for adding such?

[Crissov]

The Readme currently states that BCP47 private-use codes are not to be included:

Type: region
Subtag: [A-Z]{2}
AND NOT Description: Private use

It doesn’t say anything about ISO3166 private-use codes /(AA|ZZ|X[A-Z]|Q[M-Z])/, though.