<!DOCTYPE html>
<html lang="en-US">
<head>
    <title>html_lang_exists - Accessibility Checker Help</title>
    <script>
        RULE_MESSAGES = {"en-US":{"group":"Page must identify the default language of the document with a 'lang' attribute","Pass_0":"Page language detected as \"{0}\"","Fail_1":"Page detected as XHTML 1.0, but has neither 'lang' nor 'xml:lang' attributes","Fail_2":"Page detected as XHTML, but does not have an 'xml:lang' attribute","Fail_3":"Page detected as HTML, but does not have a 'lan