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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html lang="en"><head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Website Quality Alert - Contradictory content language specifications</title> <meta name="referrer" content="unsafe-url"> <link rel="stylesheet" type="text/css" href="https://w3techs.com/s45.css"> <body> <script type="text/javascript"> var _paq = window._paq = window._paq || []; _paq.push(['trackPageView']); _paq.push(['enableLinkTracking']); (function() { var u="https://m.q-success.com/"; _paq.push(['setTrackerUrl', u+'mtp']); _paq.push(['setSiteId', '2']); var d=document, g=d.createElement('script'), s=d.getElementsByTagName('script')[0]; g.type='text/javascript'; g.async=true; g.src=u+'mtj'; s.parentNode.insertBefore(g,s); })(); </script> <noscript><p><img src="https://m.q-success.com/mtp?idsite=2&rec=1" style="border:0" alt=""></p></noscript> <div id=doc3> <div id=hd> <div id=hdl><a href="https://w3techs.com/"><img src="https://w3techs.com/logo1.gif" alt="W3Techs" width=150 height=50></a></div> <div id=hdc style="min-height:94px;height:auto;text-align:center"> <div class=banner><script>var _ama_pid=_ama_pid||Math.floor(Math.random()*2147483647);document.write('\x3Cscript src="https://b.w3techs.com/ajs/2/2/' + _ama_pid + '/' + encodeURIComponent(window.location) + '">\x3C/script>');</script></div><a class=no_und href="https://b.w3techs.com/">advertise here</a></div> <div id=hdr><b>provided by<br><a href="https://q-success.com/web_services">Q-Success</a></b></div> </div> <div id=mn> <a href="https://w3techs.com/">Home</a> <a href="https://w3techs.com/technologies">Technologies</a> <a href="https://w3techs.com/reports">Reports</a> <a href="https://w3techs.com/apidoc">API</a> <a href="https://w3techs.com/sites">Sites</a> <a href="https://w3techs.com/quality">Quality</a> <a href="https://w3techs.com/users">Users</a> <a href="https://w3techs.com/blog">Blog</a> <a href="https://w3techs.com/forum">Forum</a> <a href="https://w3techs.com/faq">FAQ</a> <a href="https://w3techs.com/search">Search</a> </div><div class=feat1><p>Featured products and services<a style="font-size:80%;font-weight:normal;position:absolute;right:1em;" href="https://b.w3techs.com/">advertise here</a></p><script>var _ama_pid=_ama_pid||Math.floor(Math.random()*2147483647);document.write('\x3Cscript src="https://b.w3techs.com/ajs/2/5/' + _ama_pid + '/' + encodeURIComponent(window.location) + '">\x3C/script>');</script></div><div id=bd><table class=tech><tr><td class=tech_sel> </td><td class=tech_main> <h1>Website Quality Alert</h1> <h2>Contradictory content language specifications</h2> <p><p><strong>Problem:</strong></p> <p>The text-processing language defined in the <span style="font-family: Courier New;">lang</span> or <span style="font-family: Courier New;">xml:lang</span> attribute of the html tag must be within the list of languages specified in the HTML meta tag specification or the HTTP header content language specification.</p> <p>That means</p> <p style="margin-left:40px;"><span style="font-family: Courier New;"><<span class="start-tag">html lang="en"><br> </span></span><span style="font-family: Courier New;"><span class="start-tag"><meta http-equiv="Content-Language" content="ja"></span></span></p> <p style="margin-left:40px;"><span style="font-family:Courier New;"> </span><span style="font-family: Courier New;"> </span><span style="font-family:Courier New;"> </span><span style="font-family: Courier New;"> </span></p> <p>is incorrect.</p> <p><strong>Impact:</strong></p> <p>According to the <a href="https://www.w3.org/TR/i18n-html-tech-lang/">W3C Internationalization Best Practices</a>, language information is useful for things such as authoring tools, translation tools, accessibility, font selection, page rendering, search, and scripting. In practice, we see that localized search engines (such as google.it) make use of language information, so that incorrect information may have a negative impact of search engine ranking. It is also likely to affect site visitors who use <a href="https://en.wikipedia.org/wiki/Screen_reader">screen readers</a> or spell checkers, in case an input from the user is expected.</p> <p><strong>Recommendation:</strong></p> <p>Always specify the text-processing language in the html attribute, and only if necessary and helpful specify additional languages in the HTML meta tag specification or in the HTTP header content language specification, and make sure the text-processing language is included there.</p></td><td class=tech_add> </td></tr></table> </div> <div id=ft> <a href="https://w3techs.com/about" class=no_und rel=nofollow>About Us</a> <a href="https://w3techs.com/disclaimer" class=no_und rel=nofollow>Disclaimer</a> <a href="https://w3techs.com/terms_of_use" class=no_und rel=nofollow>Terms of Use</a> <a href="https://w3techs.com/privacy_policy" class=no_und rel=nofollow>Privacy Policy</a> <a href="https://b.w3techs.com/" class=no_und>Advertising</a> <a href="https://w3techs.com/feedback" class=no_und rel=nofollow>Contact</a> </div> <div id=social_ft> W3Techs on   <a href="https://www.linkedin.com/company/w3techs"><img loading=lazy src="https://w3techs.com/pictures/LinkedIn.svg" alt="LinkedIn"> LinkedIn</a> <a rel="me" href="https://techhub.social/@w3techs"><img loading=lazy src="https://w3techs.com/pictures/Mastodon.svg" alt="Mastodon"> Mastodon</a> <a href="https://bsky.app/profile/w3techs.com"><img loading=lazy src="https://w3techs.com/pictures/Bluesky.png" alt="Bluesky"> Bluesky</a> </div> <div id=cp>Copyright © 2009-2025 Q-Success<br><br> </div></div>