Wikimedia language codes

[Don Osborn]

Thank you John, this is very helpful.

Re "macrolanguage" I do recall your analogy not too long ago of it as a shim
between ISO-639-2 & 3 for certain categories (I agree that the concept
[under whatever name] seems have a utility beyond that role). I understand
now that 639-5 is generally intended for linguistic classifications not
relevant to IT applications or web content. But that there may be cases
where alpha-3's are part of more than one listing.

All the best.

Don