URI: custom-error.html.en
Content-Language: en
Content-type: text/html; charset=ISO-8859-1

URI: custom-error.html.es
Content-Language: es
Content-type: text/html; charset=ISO-8859-1

URI: custom-error.html.ja.euc-jp
Content-Language: ja
Content-type: text/html; charset=EUC-JP

URI: custom-error.html.ko.euc-kr
Content-Language: ko
Content-type: text/html; charset=EUC-KR