diff --git a/dictionaries/en.dictionary.itop.ui.php b/dictionaries/en.dictionary.itop.ui.php
index 12c8a7815..66c9c78bb 100644
--- a/dictionaries/en.dictionary.itop.ui.php
+++ b/dictionaries/en.dictionary.itop.ui.php
@@ -465,6 +465,7 @@ Dict::Add('EN US', 'English', 'English', array(
 	'UI:Error:InvalidDashboard' => 'Error: invalid dashboard',
 	'UI:Error:MaintenanceMode' => 'Application is currently in maintenance',
 	'UI:Error:MaintenanceTitle' => 'Maintenance',
+	'UI:Error:InvalidToken' => 'Error: the requested operation have already been performed (CSRF token not found)',
 
 	'UI:GroupBy:Count' => 'Count',
 	'UI:GroupBy:Count+' => 'Number of elements',
diff --git a/dictionaries/fr.dictionary.itop.ui.php b/dictionaries/fr.dictionary.itop.ui.php
index 208b749ce..db43f78bf 100644
--- a/dictionaries/fr.dictionary.itop.ui.php
+++ b/dictionaries/fr.dictionary.itop.ui.php
@@ -448,6 +448,7 @@ Dict::Add('FR FR', 'French', 'Français', array(
 	'UI:Error:InvalidDashboard' => 'Erreur: Le tableau de bord est invalide',
 	'UI:Error:MaintenanceMode' => 'L\'application est en maintenance',
 	'UI:Error:MaintenanceTitle' => 'Maintenance',
+	'UI:Error:InvalidToken' => 'Erreur: l\'opération a déjà été effectuée (CSRF token not found)',
 
 	'UI:GroupBy:Count' => 'Nombre',
 	'UI:GroupBy:Count+' => 'Nombre d\'éléments',