HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>scoped lang demo</title>
  <style>
    body { font-family: sans-serif; padding: 16px; max-width: 32rem; }
    article { padding: 12px; margin: 8px 0; border: 1px solid #e2e8f0; border-radius: 6px; }
  </style>
</head>
<body>
  <article lang="de"><h2>Guten Tag</h2><p>Deutscher Text.</p></article>
  <article lang="en"><h2>Hello</h2><p>English text.</p></article>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $("article:lang(de)").css("borderLeft", "4px solid #2563eb");
  </script>
</body>
</html>

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article:lang(de) — scoped styling (Try It)