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

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

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