Where do I set the language of a page?

[JorisVdB]

Joris, you would add or similar to each page's Web Properties > Page > HTML code (head).

I don't know how to add this for specific HTML tags in any HTML5 element (e.g., <span lang="fr">...</span>) in Xara.
Perhaps Xara could extend the Names functionality to include HtmlAttribute_<attribute>=<value> or HtmlAttribute_<attributeset>={<value>; <value>; <value>; ...} sometime soon?

Acorn

Thanks Acorn. I have implemented your suggestion:
<meta http-equiv="Content-Language" content="fr" />
and yes, Xara should integrate the possibility to set the language to every page. I don't understand why even after 11 versions they still did not. It is a basic setting that always must be set.
@egg: Yes it is a multilingual site with different languages in one website. So general settings won't do.
Thank you all for your advise.
Joris