Wordpress: Role and Capability

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/* 'Role' name change ********************************************************************************************
** http://wordpress.stackexchange.com/questions/23026/is-there-way-to-rename-user-role-name-without-plugin **** */
/* !회원 역할 이름 바꾸기 ***************************************************************************************** */
function change_role_name() {
    global $wp_roles;

    if ( ! isset( $wp_roles ) )
        $wp_roles = new WP_Roles();

    //You can list all currently available roles like this...
    //$roles = $wp_roles->get_names();
    //print_r($roles);

    //You can replace "administrator" with any other role "editor", "author", "contributor" or "subscriber"...
    $wp_roles->roles['administrator']['name'] = '최고관리자';
    $wp_roles->role_names['administrator'] = '최고관리자';
    $wp_roles->roles['editor']['name'] = '중간관리자';
    $wp_roles->role_names['editor'] = '중간관리자';
    $wp_roles->roles['author']['name'] = '학생교사';
    $wp_roles->role_names['author'] = '학생교사';
    $wp_roles->roles['subscriber']['name'] = '일반회원';
    $wp_roles->role_names['subscriber'] = '일반회원';           
}
add_action('init', 'change_role_name');

/* Add roles ****************************************************************************************************
** http://stackoverflow.com/questions/8413560/wordpress-add-custom-roles-as-well-as-remove-default-roles ***** */
/* !회원 역할 추가 ********************************************************************************************** */
/* http://octalforty.com/articles/assigning-role-on-wordpress-registration-profile-page/ <= Additional Information ******* */
add_role('장학생', '장학생', array(
    'read' => true,
    'edit_posts' => true,
    'delete_posts' => true,
    'edit_published_posts' => true,
    'publish_posts' => true,
    'delete_published_posts' => true,
));
add_role('학부모', '학부모', array(
    'read' => true,
    'edit_posts' => true,
    'delete_posts' => true,
    'edit_published_posts' => true,
    'publish_posts' => true,
    'delete_published_posts' => true,
));
/* !회원 역할 제거 */
//remove_role('role');

/* !역할의 능력 제거 & 추가 */
/* http://wordpress.stackexchange.com/questions/12984/how-can-i-allow-the-editor-role-to-change-theme-settings */
/* http://codex.wordpress.org/Roles_and_Capabilities */
$editor = get_role('editor');
$editor->remove_cap('manage_categories');
$editor->remove_cap('edit_pages');
$editor->remove_cap('edit_others_pages');
$editor->remove_cap('edit_published_pages');
$editor->remove_cap('manage_links');

$subscriber = get_role('subscriber');
$subscriber->add_cap('edit_posts');
$subscriber->add_cap('delete_posts');
$subscriber->add_cap('publish_posts');
$subscriber->add_cap('edit_published_posts');
$subscriber->add_cap('delete_published_posts');