diff --git a/addons/account/account_invoice_view.xml b/addons/account/account_invoice_view.xml
index b039349a8b9..b980cad2531 100644
--- a/addons/account/account_invoice_view.xml
+++ b/addons/account/account_invoice_view.xml
@@ -44,7 +44,7 @@
 					<page string="Line">
 						<field name="name" select="1"/>
 						<field name="account_id" on_change="onchange_account_id(parent.partner_id,account_id)" />
-						<field name="product_id" select="1" on_change="product_id_change(product_id, uos_id, quantity, name)"/>
+						<field name="product_id" select="1" on_change="product_id_change(product_id, uos_id, quantity, name, parent.type, parent.partner_id)"/>
 						<field name="uos_id"/>
 						<field name="quantity" select="1"/>
 						<field name="price_unit" select="1"/>
diff --git a/addons/account/invoice.py b/addons/account/invoice.py
index 553f145291a..c5c164a569c 100644
--- a/addons/account/invoice.py
+++ b/addons/account/invoice.py
@@ -500,10 +500,15 @@ class account_invoice_line(osv.osv):
 		'quantity': lambda *a: 1,
 		'discount': lambda *a: 0.0
 	}
-	def product_id_change(self, cr, uid, ids, product, uom, qty=0, name='', type='out_invoice'):
+	def product_id_change(self, cr, uid, ids, product, uom, qty=0, name='', type='out_invoice', partner_id=None):
 		if not product:
 			return {'value': {'price_unit': 0.0}, 'domain':{'product_uom':[]}}
-		res = self.pool.get('product.product').browse(cr, uid, product)
+		lang=False
+		if partner_id:
+			lang=self.pool.get('res.partner').read(cr, uid, [partner_id])[0]['lang']
+		context={'lang': lang}
+		print context
+		res = self.pool.get('product.product').browse(cr, uid, product, context=context)
 		result = {'price_unit': res.list_price, 'invoice_line_tax_id':map(lambda x: x.id, res.taxes_id)}
 		if not name:
 			result['name'] = res.name
diff --git a/addons/purchase/purchase.py b/addons/purchase/purchase.py
index 41aaa075094..5cd59d9c87d 100644
--- a/addons/purchase/purchase.py
+++ b/addons/purchase/purchase.py
@@ -311,10 +311,14 @@ class purchase_order_line(osv.osv):
 			raise osv.except_osv('No Pricelist !', 'You have to select a pricelist in the sale form !\n Please set one before choosing a product.')
 		if not product:
 			return {'value': {'price_unit': 0.0, 'name':'','notes':''}, 'domain':{'product_uom':[]}}
+		lang=False
+		if partner_id:
+			lang=self.pool.get('res.partner').read(cr, uid, [partner_id])[0]['lang']
+		context={'lang':lang}
 		price = self.pool.get('product.pricelist').price_get(cr,uid,[pricelist], product, qty or 1.0, partner_id, {'uom': uom})[pricelist]
 		prod = self.pool.get('product.product').read(cr, uid, [product], ['taxes_id','name','seller_delay','uom_po_id','description_purchase'])[0]
 		dt = (DateTime.now() + DateTime.RelativeDateTime(days=prod['seller_delay'] or 0.0)).strftime('%Y-%m-%d')
-		prod_name = self.pool.get('product.product').name_get(cr, uid, [product])[0][1]
+		prod_name = self.pool.get('product.product').name_get(cr, uid, [product], context=context)[0][1]
 		res = {'value': {'price_unit': price, 'name':prod_name, 'taxes_id':prod['taxes_id'], 'date_planned': dt,'notes':prod['description_purchase']}}
 		domain = {}
 		if not uom:
diff --git a/addons/sale/sale.py b/addons/sale/sale.py
index 10cb2212a26..4deec00eb6e 100644
--- a/addons/sale/sale.py
+++ b/addons/sale/sale.py
@@ -588,6 +588,8 @@ class sale_order_line(osv.osv):
 		return super(sale_order_line, self).copy(cr, uid, id, default, context)
 
 	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):
+		if partner_id:
+			lang=self.pool.get('res.partner').read(cr, uid, [partner_id])[0]['lang']
 		context = {'lang':lang}
 		if not product:
 			return {'value': {'price_unit': 0.0, 'notes':'', 'weight' : 0}, 'domain':{'product_uom':[]}}