diff --git a/config/locales/zh_tw.yml b/config/locales/zh_tw.yml
index 8c45d0b..f2cd7c4 100644
--- a/config/locales/zh_tw.yml
+++ b/config/locales/zh_tw.yml
@@ -12,6 +12,7 @@ zh_tw:
     paper_levels: "論文等級"
     conference_title : "會議名稱"
     conference_time: "會議時間"
+    period : "期間"
     period_start_date : "會議開始時間"
     period_end_date : "會議結束時間"
     duration: "期間"