Enable Content Languages
A tiny Joomla system plugin that sets the HTML "lang" and "xml:lang" attributes for any content article that has a language set. It does not change the entire page, just sets the correct language definition in the <html> tag.
If a corresponding front-end language pack has been installed, various labels on the page (e.g. "next page") will be translated into the target language. This makes EnableContentLanguages ideal for making small numbers of extra pages in alternative languages on your Joomla site, without needing to install a complete JoomlaFish (or other) translation management system.