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Both pages that were cited here (ISO 639 and RFC 3066) use "en_GB" for "United Kingdom," as if Great Britain and the United Kingdom were the same thing - which of course they aren't.
-----Original Message-----
From: Monique Semp
Sent: Monday, November 25, 2013 4:56 PM
To: Guy K. Haas; Nancy Allison
Cc: techwr-l -at- lists -dot- techwr-l -dot- com
Subject: Re: Abbreviations for Languages?
ISO-639 are the two-letter codes, but to combine the language and the region, you want ISO-3166, which gives you en_US and en_GB for US English and Great Britain English.
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