diff --git a/config/locales/en.yml b/config/locales/en.yml
index cdc5133..196285b 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -13,6 +13,7 @@ en:
     paper_levels : "Paper Level"
     conference_title : "Conference Name"
     conference_time: "Conference Time"
+    period : "Peroid"
     period_start_date : "Start Date"
     period_end_date : "End Date"
     duration: "Duration"