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Bitcoin is Stupid and Does Not Deserve an Emoji (blog post)
(thedabbler.patatas.ca)
This is a most excellent place for technology news and articles.
Technically, emoji doesn't even have specific flags, they just have country codes, conforming to the ISO list - actually choosing which flags will be included is up to the individual implemeters. Regional flags got a little bit complicated because they need to establish the conventions first.