<!DOCTYPE html>
<html lang="en-US">
<head>
    <title>html_lang_valid - Accessibility Checker Help</title>
    <script>
        RULE_MESSAGES = {"en-US":{"Pass_0":"Lang has a valid primary lang and conforms to BCP 47","Fail_1":"Specified 'lang' attribute does not include a valid primary language","Fail_2":"Specified 'lang' attribute does not conform to BCP 47","Fail_3":"Specified 'xml:lang' attribute does not include a valid primary language","Fail_4":"Specified 'xml:lang' attribute does not conform to BCP 