diff --git a/addons/sale/sale.py b/addons/sale/sale.py
index 0b436f0dc91..64faca26e77 100644
--- a/addons/sale/sale.py
+++ b/addons/sale/sale.py
@@ -1013,7 +1013,9 @@ class sale_order_line(osv.osv):
 
     def product_id_change(self, cr, uid, ids, pricelist, product, qty=0,
             uom=False, qty_uos=0, uos=False, name='', partner_id=False,
-            lang=False, update_tax=True, date_order=False, packaging=False, fiscal_position=False, flag=False):
+            lang=False, update_tax=True, date_order=False, packaging=False, fiscal_position=False, flag=False, context=None):
+        context = context or {}
+        lang = lang or ('lang' in context and context['lang'])
         if not  partner_id:
             raise osv.except_osv(_('No Customer Defined !'), _('You have to select a customer in the sales form !\nPlease set one customer before choosing a product.'))
         warning = {}
diff --git a/addons/sale/sale_view.xml b/addons/sale/sale_view.xml
index 6c444ad174d..14d3046e885 100644
--- a/addons/sale/sale_view.xml
+++ b/addons/sale/sale_view.xml
@@ -128,12 +128,12 @@
                                             <field colspan="4"
                                                 context="{'partner_id':parent.partner_id, 'quantity':product_uom_qty, 'pricelist':parent.pricelist_id, 'shop':parent.shop_id, 'uom':product_uom}"
                                                 name="product_id"
-                                                on_change="product_id_change(parent.pricelist_id,product_id,product_uom_qty,product_uom,product_uos_qty,product_uos,name,parent.partner_id, 'lang' in context and context['lang'], True, parent.date_order, product_packaging, parent.fiscal_position, False)"
+                                                on_change="product_id_change(parent.pricelist_id,product_id,product_uom_qty,product_uom,product_uos_qty,product_uos,name,parent.partner_id, False, True, parent.date_order, product_packaging, parent.fiscal_position, False, context)"
                                                 />
                                             <field
                                                 context="{'partner_id':parent.partner_id, 'quantity':product_uom_qty, 'pricelist':parent.pricelist_id, 'shop':parent.shop_id, 'uom':product_uom}"
                                                 name="product_uom_qty"
-                                                on_change="product_id_change(parent.pricelist_id,product_id,product_uom_qty,product_uom,product_uos_qty,product_uos,name,parent.partner_id, 'lang' in context and context['lang'], False, parent.date_order, product_packaging, parent.fiscal_position, True)"
+                                                on_change="product_id_change(parent.pricelist_id,product_id,product_uom_qty,product_uom,product_uos_qty,product_uos,name,parent.partner_id, False, False, parent.date_order, product_packaging, parent.fiscal_position, True, context)"
                                                 />
                                             <field name="product_uom"
                                                 on_change="product_uom_change(parent.pricelist_id,product_id,product_uom_qty,product_uom,product_uos_qty,product_uos,name,parent.partner_id, 'lang' in context and context['lang'], False, parent.date_order)"/>
@@ -142,7 +142,7 @@
                                             <field
                                                 name="product_packaging"
                                                 context="{'partner_id':parent.partner_id, 'quantity':product_uom_qty, 'pricelist':parent.pricelist_id, 'shop':parent.shop_id, 'uom':product_uom}"
-                                                on_change="product_id_change(parent.pricelist_id,product_id,product_uom_qty,product_uom,product_uos_qty,product_uos,name,parent.partner_id, 'lang' in context and context['lang'], False, parent.date_order, product_packaging, parent.fiscal_position, False)"
+                                                on_change="product_id_change(parent.pricelist_id,product_id,product_uom_qty,product_uom,product_uos_qty,product_uos,name,parent.partner_id, False, False, parent.date_order, product_packaging, parent.fiscal_position, False, context)"
                                                 domain="[('product_id','=',product_id)]"
                                                 groups="base.group_extended"/>
 
diff --git a/addons/sale_layout/sale_layout_view.xml b/addons/sale_layout/sale_layout_view.xml
index 6dee4ddd62f..4b69a01d919 100644
--- a/addons/sale_layout/sale_layout_view.xml
+++ b/addons/sale_layout/sale_layout_view.xml
@@ -22,13 +22,13 @@
                                             context="{'partner_id':parent.partner_id,'quantity':product_uom_qty,'pricelist':parent.pricelist_id,'shop':parent.shop_id,'uom':product_uom}"
                                             name="product_id"
                                             attrs="{'readonly':[('layout_type','!=','article')]}"
-                                            on_change="product_id_change(parent.pricelist_id,product_id,product_uom_qty,product_uom,product_uos_qty,product_uos,name,parent.partner_id, 'lang' in context and context['lang'], True, parent.date_order, product_packaging, parent.fiscal_position)"
+                                            on_change="product_id_change(parent.pricelist_id,product_id,product_uom_qty,product_uom,product_uos_qty,product_uos,name,parent.partner_id, False, True, parent.date_order, product_packaging, parent.fiscal_position, False, context)"
                                             select="1"/>
                                         <field
                                             context="{'partner_id':parent.partner_id,'quantity':product_uom_qty,'pricelist':parent.pricelist_id,'shop':parent.shop_id,'uom':product_uom}"
                                             name="product_uom_qty"
                                             attrs="{'readonly':[('layout_type','!=','article')]}"
-                                            on_change="product_id_change(parent.pricelist_id,product_id,product_uom_qty,product_uom,product_uos_qty,product_uos,name,parent.partner_id, 'lang' in context and context['lang'], False, parent.date_order, product_packaging, parent.fiscal_position)"
+                                            on_change="product_id_change(parent.pricelist_id,product_id,product_uom_qty,product_uom,product_uos_qty,product_uos,name,parent.partner_id, False, False, parent.date_order, product_packaging, parent.fiscal_position, False, context)"
                                             select="1"/>
                                         <field name="product_uom"
                                                required="0"
@@ -38,7 +38,7 @@
                                             name="product_packaging"
                                             attrs="{'readonly':[('layout_type','!=','article')]}"
                                             context="{'partner_id':parent.partner_id,'quantity':product_uom_qty,'pricelist':parent.pricelist_id,'shop':parent.shop_id,'uom':product_uom}"
-                                            on_change="product_id_change(parent.pricelist_id,product_id,product_uom_qty,product_uom,product_uos_qty,product_uos,name,parent.partner_id, 'lang' in context and context['lang'], False, parent.date_order, product_packaging, parent.fiscal_position)"
+                                            on_change="product_id_change(parent.pricelist_id,product_id,product_uom_qty,product_uom,product_uos_qty,product_uos,name,parent.partner_id, False, False, parent.date_order, product_packaging, parent.fiscal_position, False, context)"
                                             domain="[('product_id','=',product_id)]"
                                             groups="base.group_extended"/>
                                         <separator colspan="4" string="Manual Description" />