Ensure that you have fonts that can represent Korean characters. Ensure that the default encoding for the browser you are testing is not set to UTF-16.
UTF-16LE BOM vs HTML5 meta charset
Click on the link. Test passes if the two lines on the linked page are the same.
Assertion: A page with a UTF-16 little-endian BOM will be recognized as UTF-16 even if the meta charset element declares a different encoding.
Notes:
The UTF-16 encoded target page starts with a little-endian BOM, but UTF-8 is declared in the meta charset element. If the UTF-8 encoding is applied, the page should render as garbage.
The text contains the following sequence of bytes: 0xC3 0xBD 0xC3 0xA4 0xC3 0xA8. The characters serve to distinguish ISO 8859-15 from ISO 8859-1, UTF-8 and UTF-16.
The graphic on the lower line shows what you would expect to see if the page is encoded as UTF-16.