diff --git a/bin/addons/base/ir/ir_translation.py b/bin/addons/base/ir/ir_translation.py
index 211f9dbaf45..6fc906de0ad 100644
--- a/bin/addons/base/ir/ir_translation.py
+++ b/bin/addons/base/ir/ir_translation.py
@@ -43,6 +43,7 @@ TRANSLATION_TYPE = [
 	('xsl', 'XSL'),
 	('help', 'Help'),
 	('code', 'Code'),
+	('constraint', 'Constraint'),
 ]
 
 class ir_translation(osv.osv, Cacheable):
diff --git a/bin/osv/orm.py b/bin/osv/orm.py
index 0bf3fb22cab..5b770f51be2 100644
--- a/bin/osv/orm.py
+++ b/bin/osv/orm.py
@@ -625,14 +625,17 @@ class orm_template(object):
 	def read(self, cr, user, ids, fields=None, context=None, load='_classic_read'):
 		raise _('The read method is not implemented on this object !')
 
-	def _validate(self, cr, uid, ids):
+	def _validate(self, cr, uid, ids, context=None):
+		context = context or {}
+		lng = context.get('lang', False) or 'en_US'
+		trans = self.pool.get('ir.translation')
 		field_error = []
 		field_err_str = []
-		for field in self._constraints:
-			if not field[0](self, cr, uid, ids):
-				if len(field)>1:
-					field_error+=field[2]
-				field_err_str.append(field[1])
+		for constraint in self._constraints:
+			fun, msg, fields = constraint
+			if not fun(self, cr, uid, ids):
+				field_error += fields
+				field_err_str.append( trans._get_source(cr, uid, self._name, 'constraint', lng, source=msg) )
 		if len(field_err_str):
 			cr.rollback()
 			raise except_orm('ValidateError', ('\n'.join(field_err_str), ','.join(field_error)))
@@ -1141,7 +1144,7 @@ class orm_memory(orm_template):
 			self.datas[id_new]['internal.date_access'] = time.time()
 			for field in upd_todo:
 				self._columns[field].set_memory(cr, self, id_new, field, vals[field], user, context)
-		self._validate(cr, user, [id_new])
+		self._validate(cr, user, [id_new], context)
 		wf_service = netsvc.LocalService("workflow")
 		wf_service.trg_write(user, self._name, id_new, cr)
 		self.clear()
@@ -1167,7 +1170,7 @@ class orm_memory(orm_template):
 		self.datas[id_new]['internal.date_access'] = time.time()
 		for field in upd_todo:
 			self._columns[field].set_memory(cr, self, id_new, field, vals[field], user, context)
-		self._validate(cr, user, [id_new])
+		self._validate(cr, user, [id_new], context)
 		wf_service = netsvc.LocalService("workflow")
 		wf_service.trg_create(user, self._name, id_new, cr)
 		self.clear()
@@ -2010,7 +2013,7 @@ class orm(orm_template):
 					v[val]=vals[val]
 			self.pool.get(table).write(cr, user, nids, v, context)
 
-		self._validate(cr, user, ids)
+		self._validate(cr, user, ids, context)
 
 		if context.has_key('read_delta'):
 			del context['read_delta']
@@ -2122,7 +2125,7 @@ class orm(orm_template):
 		for field in upd_todo:
 			self._columns[field].set(cr, self, id_new, field, vals[field], user, context)
 
-		self._validate(cr, user, [id_new])
+		self._validate(cr, user, [id_new], context)
 
 		wf_service = netsvc.LocalService("workflow")
 		wf_service.trg_create(user, self._name, id_new, cr)
diff --git a/bin/tools/translate.py b/bin/tools/translate.py
index e38c0f203b1..2ccd458c7d6 100644
--- a/bin/tools/translate.py
+++ b/bin/tools/translate.py
@@ -239,7 +239,10 @@ def trans_generate(lang, modules, dbname=None):
 				if fname:
 					logger.notifyChannel("init", netsvc.LOG_WARNING, "couldn't export translation for report %s %s %s" % (name, report_type, fname))
 
-		
+		for constraint in pool.get(model)._constraints:
+			msg = constraint[1]
+			push_translation(module, 'constraint', model, 0, msg.encode('utf8'))
+
 		for field_name,field_def in pool.get(model)._columns.items():
 			if field_def.translate:
 				name = model + "," + field_name