primary language meta tags
i am developing a site into 8 languages, where the language data populates the page from either a database or via a php includes file, depending on the appropriate session value.
It works well, and i am now working on the seo aspects.
i have the title, content and keyword tags working as above, using php includes, but was wondering about the language tag and how important it was.
<meta http-equiv="Content-Language" content="en" /> may be relevant for a primarily english site, would I replace the content with an appropriate language tag, eg "it" for italian.
Does this have much effect on search engines, if I am 'googling' from italy for example ?