diff --git a/app/models/comment.rb b/app/models/comment.rb
index fa000c8..92f646f 100644
--- a/app/models/comment.rb
+++ b/app/models/comment.rb
@@ -31,13 +31,13 @@ class Comment < ActiveRecord::Base
 
   validate do
     self.comment.to_s.strip == "" &&
-      errors.add(:comment, "cannot be blank.")
+      errors.add(" ", I18n.t( 'models.comment.commentcannotbeblank'))
 
     self.user_id.blank? &&
-      errors.add(:user_id, "cannot be blank.")
+      errors.add(" ", I18n.t( 'models.comment.useridcannotbeblank'))
 
     self.story_id.blank? &&
-      errors.add(:story_id, "cannot be blank.")
+      errors.add(" ", I18n.t( 'models.comment.storyidcannotbeblank'))
 
     (m = self.comment.to_s.strip.match(/\A(t)his([\.!])?$\z/i)) &&
       errors.add(:base, (m[1] == "T" ? "N" : "n") + "ope" + m[2].to_s)
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 540fd2e..c4223c1 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -10,6 +10,9 @@ en:
       subject: "[%{appname}] You have been invited to %{appname}"
   models:
     comment:
+      commentcannotbeblank: "A comment cannot be blank."
+      useridcannotbeblank: "A user ID cannot be blank."
+      storyidcannotbeblank: "A story ID cannot be blank."
       deletedcomment: "deleted comment"
       threadremovedby: "Thread removed by moderator %{modoname} : %{modreason}" 
     moderation:
diff --git a/config/locales/fr.yml b/config/locales/fr.yml
index 464576d..5f764c9 100644
--- a/config/locales/fr.yml
+++ b/config/locales/fr.yml
@@ -22,6 +22,9 @@ fr:
       subject: "[%{appname}] Vous avez été invité au %{appname}"
   models:
     comment:
+      commentcannotbeblank: "Un commentaire ne peut pas être vide."
+      useridcannotbeblank: "Un ID utilisateur ne peut pas être vide."
+      storyidcannotbeblank: "Un ID d'info ne peut pas être vide."
       deletedcomment: "commentaire supprimé"
       threadremovedby: "Fil supprimé par le modérateur %{modoname} : %{modreason}"
     moderation: