[UND WCAG2] i18n comment: dc:lang

Comment from the i18n review of:
http://www.w3.org/TR/2006/WD-UNDERSTANDING-WCAG20-20060427/

Comment 3
At http://www.w3.org/International/reviews/0606-understanding-wcag2/
Editorial/substantive: E
Owner: RI

Location in reviewed document:
3.1 Additional techniques

Comment: 
We would be interested in knowing what you will say about use of dc:lang