If I open strings_korean_utf8.txt as UTF-8 code, it displays this:

<?php

Mantis - a php based bugtracking system

# Copyright (C) 2000 - 2002  Kenzaburo Ito - kenito@300baud.org
# Copyright (C) 2002 - 2004  Mantis Team   - mantisbt-dev@lists.sourceforge.net
# This program is distributed under the terms and conditions of the GPL
# See the README and LICENSE files for details

If I open strings_korean_utf8.txt as ANSI code, it displays this:

ï»??php

Mantis - a php based bugtracking system

# Copyright (C) 2000 - 2002  Kenzaburo Ito - kenito@300baud.org
# Copyright (C) 2002 - 2004  Mantis Team   - mantisbt-dev@lists.sourceforge.net
# This program is distributed under the terms and conditions of the GPL
# See the README and LICENSE files for details

If I replace 'ï»??php' with '<?php', korean can use UTF-8