<!-- Any copyright is dedicated to the Public Domain. http://creativecommons.org/publicdomain/zero/1.0/ --> <svg xmlns="http://www.w3.org/2000/svg" xml:lang="foo"> <title>Test the 'xml:lang' attribute in SVG</title> <!-- From https://bugzilla.mozilla.org/show_bug.cgi?id=368840 --> <style type="text/css"> rect:lang(foo) { fill: lime; } </style> <rect width="100%" height="100%" fill="red"/> </svg>