I want inject IkiWiki::showform and use replace submit button with translated button, but it seem no effect in cgi, does IkiWiki::showfrom can not be injectd when run as cgi?

by the way, what about add a post-showform hook to ikiwiki?

the below is my code:

package IkiWiki::Plugin::chinesize;

use warnings;
use strict;
use IkiWiki 3.00;

inject(name => 'IkiWiki::showform', call => \&myshowform);

sub myshowform ($$$$;@) {
                my $form=prepform(@_);
                my $buttons=shift;
                my $session=shift;
                my $cgi=shift;

                my $str=cgitemplate($cgi, $form->title,
                                          $form->render(submit => $buttons), @_);

                my %names = ("Save Page" => "保存页面",
                             "Preview"   => "预览",
                             "Cancel"    => "取消",
                             "Diff"      => "差异比较",
                             "Rename"    => "重命名",
                             "Remove"    => "删除",
                             "Login"     => "登录",
                             "Register"  => "注册",
                             "Logout"    => "退出",
                             "Setup"     => "设置",
                             "Users"     => "所有用户",
                             "Name"      => "用户名",
                             "Password"  => "密码",
                             "Email"     => "电子邮件",
                             "Save Preferences"   => "保存选项",
                             "Confirm Password"   => "再次输入密码",
                             "Create Account"     => "创建帐户",
                             "Reset Password"     => "重置密码",
                             "Insert Links"       => "插入链接",
                             "Rename Attachment"  => "重命名附件",
                             "Remove Attachments" => "删除附件",
                             "FormattingHelp"     => "格式帮助",
                             "Reset"              => "重置",
                             "Save Setup"         => "保存设置",
                             "Advanced Mode"      => "高级模式",
                             "Account Creation Password" => "请输入帐户创建密码(管理员预设)"

                foreach my $old_name (keys(%names))
                my $new_name = Encode::decode_utf8($names{$old_name});
                $str =~ s/<input +id="([_A-Za-z0-9]+)" +name="([_A-Za-z0-9]+)" +type="([_A-Za-z0-9]+)" +value="($old_name)" +\/>/<button id="$1" name="$2" type="$3" value="$4">$new_name<\/button>/g;
                $str =~ s/<input +name="([_A-Za-z0-9]+)" +type="([_A-Za-z0-9]+)" +value="($old_name)" +\/>/<button name="$1" type="$2" value="$3">$new_name<\/button>/g;
                $str =~ s/<input +class="([_A-Za-z0-9]+)" +id="([_A-Za-z0-9]+)" +name="([_A-Za-z0-9]+)" +type="([_A-Za-z0-9]+)" +value="($old_name)" +\/>/<button class="$1" id="$2" name="$3" type="$4" value="$5">$new_name<\/button>/g;
                $str =~ s/<div class="([_A-Za-z0-9]+)" id="([_A-Za-z0-9]+)">$old_name<\/div>/<div class="$1" id="$2">$new_name<\/div>/g;
                $str =~ s/<div class="([_A-Za-z0-9]+)" id="([_A-Za-z0-9]+)"><span class="([_A-Za-z0-9]+)">$old_name<\/span><\/div>/<div class="$1" id="$2"><span class="$3">$new_name<\/span><\/div>/g;
                $str =~ s/<a href="\.\/ikiwiki\/formatting\/">($old_name)<\/a>/<a href="\.\/ikiwiki\/formatting\/">$new_name<\/a>/g;

                print $str