What's the difference between these two meta-tags<meta http-equiv=Content-Language content=de, en/><meta name=language content=de, en>Are they both needed?
Difference between meta tags Content-Language and language
language;meta tags
Content-language is going away soon (note the big red obsolete), and I'm not sure language was ever official.  The W3C recommends this instead:<html lang=en>The lang attribute works with most tags (except <script />, <br />, <frame />, etc), so you can mix, match, and cascade:<p>This is English, since the html tag covers it.</p><p lang=ja></p><p>And back to English.</p>It's been around since HTML 4 so it's safe. Since it's just a semantic descriptor, browsers don't fully support it (they only need to know the character set).  Google & friends understand it though, and that probably matters more.