Chinese Local,hope it added in the next release.Code is below
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---    Chinese    ---
--- by Yeachan  ---
if ( GetLocale() == "zhCN") then
  TITAN_MAIL_MENU_TEXT = "邮件"
  TITAN_MAILRIGHT_MENU_TEXT = "邮件 (右侧)"
  TITAN_MAIL_BUTTON_TEXT_NOMAIL = "没有邮件 ";
  TITAN_MAIL_BUTTON_TEXT_MAIL = "有新邮件";
  TITAN_MAIL_BUTTON_TEXT_ALERT = "拍卖行信件! ";
  TITAN_MAIL_CHAT_NEW = "收到新邮件";

  TITAN_MAIL_TOOLTIP = "邮件助手"
  TITAN_MAIL_TOOLTIP_NEW = "有新邮寄物品\n";
  TITAN_MAIL_TOOLTIP_TOTAL = " 所有邮件附件物品";
  TITAN_MAIL_TOOLTIP_OUTBID = "竞标失败: ";
  TITAN_MAIL_TOOLTIP_WON = "竞标获胜: ";
  TITAN_MAIL_TOOLTIP_EXPIRED = "拍卖到期: ";
  TITAN_MAIL_TOOLTIP_CANCELLED = "拍卖取消: ";
  TITAN_MAIL_TOOLTIP_SOLD = "已售出: ";

  TITAN_MAIL_MENU_HIDEMM = "隐藏小地图邮件图标";
  TITAN_MAIL_MENU_COMPACT = "简洁模式";
  TITAN_MAIL_MENU_CHAT = "聊天窗口通告";
  TITAN_MAIL_MENU_SOUND = "使用声音报告";
  TITAN_MAIL_MENU_STEXT = "显示内容";
  TITAN_MAIL_MENU_COUNT = "显示数目";
  TITAN_MAIL_MENU_ALTICON = "改变拍卖行图标";
  TITAN_MAIL_MENU_NOICONNOMAIL = "如无邮件则不显示图标";

  TITAN_MAIL_MENU_TEXT = "郵件"
  TITAN_MAILRIGHT_MENU_TEXT = "郵件 (右側)"
  TITAN_MAIL_BUTTON_TEXT_NOMAIL = "沒有郵件 ";
  TITAN_MAIL_BUTTON_TEXT_MAIL = "有新郵件";
  TITAN_MAIL_BUTTON_TEXT_ALERT = "拍賣行信件! ";
  TITAN_MAIL_CHAT_NEW = "收到新郵件";

if ( GetLocale() == "zhTW") then
  TITAN_MAIL_TOOLTIP = "郵件助手"
  TITAN_MAIL_TOOLTIP_NEW = "有新郵寄物品\n";
  TITAN_MAIL_TOOLTIP_TOTAL = " 所有郵件附件物品";
  TITAN_MAIL_TOOLTIP_OUTBID = "競標失敗: ";
  TITAN_MAIL_TOOLTIP_WON = "競標獲勝: ";
  TITAN_MAIL_TOOLTIP_EXPIRED = "拍賣到期: ";
  TITAN_MAIL_TOOLTIP_CANCELLED = "拍賣取消: ";
  TITAN_MAIL_TOOLTIP_SOLD = "已售出: ";

  TITAN_MAIL_MENU_HIDEMM = "隱藏小地圖郵件圖標";
  TITAN_MAIL_MENU_COMPACT = "簡潔模式";
  TITAN_MAIL_MENU_CHAT = "聊天窗口通告";
  TITAN_MAIL_MENU_SOUND = "使用聲音報告";
  TITAN_MAIL_MENU_STEXT = "顯示內容";
  TITAN_MAIL_MENU_COUNT = "顯示數目";
  TITAN_MAIL_MENU_ALTICON = "改變拍賣行圖標";
  TITAN_MAIL_MENU_NOICONNOMAIL = "如無郵件則不顯示圖標";