diff --git a/config/locales/simple_form.en.yml b/config/locales/simple_form.en.yml
index 2374383..b309fe8 100644
--- a/config/locales/simple_form.en.yml
+++ b/config/locales/simple_form.en.yml
@@ -10,6 +10,12 @@ en:
       # html: '<abbr title="required">*</abbr>'
     error_notification:
       default_message: "Please review the problems below:"
+    labels:
+      defaults:
+        interval: "Interval (in days)"
+    placeholders:
+      defaults:
+        interval: 30
     # Examples
     # labels:
     #   defaults:
diff --git a/config/locales/simple_form.fr.yml b/config/locales/simple_form.fr.yml
index c824f79..680c92e 100644
--- a/config/locales/simple_form.fr.yml
+++ b/config/locales/simple_form.fr.yml
@@ -10,6 +10,12 @@ fr:
       # html: '<abbr title="required">*</abbr>'
     error_notification:
       default_message: "Merci de vérifier les erreurs ci-dessous :"
+    labels:
+      defaults:
+        interval: "Délai (en jours)"
+    placeholders:
+      defaults:
+        interval: 30
     # Examples
     # labels:
     #   defaults: