rsanchez/http_header — pull request #10 by mimo84 (2013-03-24 10:19:01+00:00)
Title: Added support for the Content-Language HTTP header

I added the Content-Language HTTP header ( http://www.w3.org/TR/i18n-html-tech-lang/#ri20060630.133615821 )
I'm using it on a multilingual website in this way:

{exp:http_header content_language="{country_code}"}