title: HTML language code
body: <p>I have small sections of text on my site that are in French (Canadian). When I look up on the <a href="http://www.w3schools.com/tags/ref_language_codes.asp" rel="nofollow">W3schools language code reference</a>, I find there is only a list of specific languages but not location. Is writing <code>&lt;span lang="fr-CA"&gt;</code> valid? Does adding the location-base of the language have any impact at all on screen-readers?</p>