diff --git a/htdocs/langs/en_US/main.lang b/htdocs/langs/en_US/main.lang
index 368f82db789..4ef2490f311 100644
--- a/htdocs/langs/en_US/main.lang
+++ b/htdocs/langs/en_US/main.lang
@@ -139,6 +139,12 @@ DateOperationShort=Ope. Date
 DateLimit=Limit date
 DateRequest=Request date 
 DateProcess=Process date
+DurationYear=year
+DurationMonth=month
+DurationDay=day
+DurationYears=years
+DurationMonths=months
+DurationDays=days
 Year=Year
 Month=Month
 Week=Week
diff --git a/htdocs/langs/fr_FR/main.lang b/htdocs/langs/fr_FR/main.lang
index cac93bae65b..341c8156f45 100644
--- a/htdocs/langs/fr_FR/main.lang
+++ b/htdocs/langs/fr_FR/main.lang
@@ -139,6 +139,12 @@ DateOperationShort=Date op
 DateLimit=Date limite
 DateRequest=Date demande
 DateProcess=Date traitement
+DurationYear=an
+DurationMonth=mois
+DurationDay=jour
+DurationYears=ans
+DurationMonths=mois
+DurationDays=jours
 Year=Année
 Month=Mois
 Week=Semaine