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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Language" content="en-US">
</head>
<body>
<textarea id="none">root en-US</textarea>
<textarea id="en-GB" lang="en-GB">root en-US, but element en-GB</textarea>
<textarea id="en-gb" lang="en-gb">root en-US, but element en-gb (lower case)</textarea>
<textarea id="en-ZA-not-avail" lang="en-ZA">root en-US, but element en-ZA (which is not installed)</textarea>
<textarea id="en-generic" lang="en">root en-US, but element en</textarea>
<textarea id="en" lang="en">root en-US, but element en</textarea>
<textarea id="ko-not-avail" lang="ko">root en-US, but element ko (which is not installed)</textarea>
</body>
</html>