Updated article: Why use the language attribute?

Links were updated in the Accessibility and Font Selection sections, and in the Further Reading section.

The paragraph in the Page Rendering section that read “This is not implemented in the current version of Microsoft Internet Explorer, but does work in other browsers such as Mozilla” was removed, since this feature has been supported in IE since version 8 and for longer in the other major browsers.

The translations were updated with the same changes.