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?
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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:
lang attribute works with most tags (except
<frame />, etc), so you can mix, match, and cascade:
<p>This is English, since the html tag covers it.</p> <p lang="ja">しかし、これではない</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.