See http://www.w3.org/TR/NOTE-html-lan 

You are right regarding the content language value and this is why I want to
change the LANG attribute to receive multiple values.
Regards,
Reuven Nisser
Ofek Liyladenu


-----Original Message-----
From: Johannes Koch [mailto:koch@w3development.de]
Sent: Wednesday, September 24, 2003 6:37 PM
To: Reuven Nisser
Cc: www-html@w3.org
Subject: Re: Problem with LANG keyword

...

And I can't find anything about priorities in the section. According to
the HTTP/1.1 spec, a document with hebrew text interspersed with english
words, should be sent with
   Content-Language: he
because the intended audience is hebrew speaking people, not english
speaking people.
...