diff --git a/addons/account/account.py b/addons/account/account.py
index 0019c0e7a9f..97b66f84ff0 100644
--- a/addons/account/account.py
+++ b/addons/account/account.py
@@ -661,7 +661,7 @@ class account_account(osv.osv):
                 # Allow the write if the value is the same
                 for i in [i['company_id'][0] for i in self.read(cr,uid,ids,['company_id'])]:
                     if vals['company_id']!=i:
-                        raise osv.except_osv(_('Warning !'), _('You cannot modify the company as its related to existing journal items.'))
+                        raise osv.except_osv(_('Warning !'), _('You cannot change the owner company of an account that already contains journal items.'))
         if 'active' in vals and not vals['active']:
             self._check_moves(cr, uid, ids, "write", context=context)
         if 'type' in vals.keys():
@@ -1341,7 +1341,8 @@ class account_move(osv.osv):
                 if not top_common:
                     top_common = top_account
                 elif top_account.id != top_common.id:
-                    raise osv.except_osv(_('Error !'), _('You cannot validate a journal entry because account "%s" does not belong to chart of accounts "%s"!' % (account.name, top_common.name)))
+                    raise osv.except_osv(_('Error !'),
+                                         _('You cannot validate this journal entry because account "%s" does not belong to chart of accounts "%s"!') % (account.name, top_common.name))
         return self.post(cursor, user, ids, context=context)
 
     def button_cancel(self, cr, uid, ids, context=None):