diff --git a/htdocs/core/boxes/box_graph_invoices_permonth.php b/htdocs/core/boxes/box_graph_invoices_permonth.php
index 7b797b98ab0294b4aa1fee5625a27a038165fe79..3848960e5e946ccc87ace8d01ee4c91ed39048a4 100644
--- a/htdocs/core/boxes/box_graph_invoices_permonth.php
+++ b/htdocs/core/boxes/box_graph_invoices_permonth.php
@@ -170,6 +170,8 @@ class box_graph_invoices_permonth extends ModeleBoxes
 				$mesg = $px2->isGraphKo();
 				if (! $mesg)
 				{
+				    $langs->load("bills");
+				    
 					$px2->SetData($data2);
 					unset($data2);
 					$px2->SetPrecisionY(0);
diff --git a/htdocs/core/boxes/box_graph_invoices_supplier_permonth.php b/htdocs/core/boxes/box_graph_invoices_supplier_permonth.php
index 31d9f811257783c69c484d6ba3f7459d20bbd04b..0931d2d05df6af75e619f2f7e316178161f9efae 100644
--- a/htdocs/core/boxes/box_graph_invoices_supplier_permonth.php
+++ b/htdocs/core/boxes/box_graph_invoices_supplier_permonth.php
@@ -169,6 +169,8 @@ class box_graph_invoices_supplier_permonth extends ModeleBoxes
 				$mesg = $px2->isGraphKo();
 				if (! $mesg)
 				{
+				    $langs->load("bills");
+				    
 					$px2->SetData($data2);
 					unset($data2);
 					$px2->SetPrecisionY(0);