--- a/cubicweb/pyramid/login.py	Fri Nov 18 10:28:41 2016 +0100
+++ b/cubicweb/pyramid/login.py	Fri Jan 13 11:36:51 2017 +0100
@@ -81,5 +81,13 @@
 
 def includeme(config):
     """ Create the 'login' route ('/login') and load this module views"""
+    cwconfig = config.registry['cubicweb.config']
     config.add_route('login', '/login')
+    if cwconfig.get('language-mode') == 'url-prefix':
+        config.add_route('login-lang', '/{lang}/login')
+        config.add_view(login_already_loggedin, route_name='login-lang',
+                        effective_principals=security.Authenticated)
+        config.add_view(login_form, route_name='login-lang')
+        config.add_view(login_password_login, route_name='login-lang',
+                        request_param=('__login', '__password'))
     config.scan('cubicweb.pyramid.login')

--- a/cubicweb/pyramid/test/test_login.py	Fri Nov 18 10:28:41 2016 +0100
+++ b/cubicweb/pyramid/test/test_login.py	Fri Jan 13 11:36:51 2017 +0100
@@ -3,8 +3,25 @@
 
 from cubicweb.pyramid.test import PyramidCWTest
 
+class LoginTestLangUrlPrefix(PyramidCWTest):
+
+    @classmethod
+    def setUpClass(cls):
+        super(LoginTestLangUrlPrefix, cls).setUpClass()
+        cls.config.global_set_option('language-mode', 'url-prefix')
+
+    def test_login_password_login_lang_prefix(self):
+        res = self.webapp.post('/fr/login', {
+            '__login': self.admlogin, '__password': self.admpassword})
+        self.assertEqual(res.status_int, 303)
+
+        res = self.webapp.get('/fr/login')
+        self.assertEqual(res.status_int, 303)
+
+
 
 class LoginTest(PyramidCWTest):
+
     def test_login_form(self):
         res = self.webapp.get('/login')
         self.assertIn('__login', res.text)