Inform about JMSI18nRoutingBundle compatibility

Resources/doc/usage.rst

@@ -140,6 +140,24 @@ Moreover, you can configure a list of routes to expose in ``app/config/config.ym
 These routes will be added to the exposed routes. You can use regular expression
 patterns if you don't want to list all your routes name by name.
 
+.. note::
+
+    If you're using `JMSI18nRoutingBundle`_ for your internationalized routes, your exposed routes must now match the bundle locale-prefixed routes, so you could either specify each locale by hand in the routes names, or use a regular expression to match all of your locales at once:
+
+.. code-block:: yaml
+
+    # app/config/config.yml
+    fos_js_routing:
+        routes_to_expose: [ en__RG__route_1, en__RG__route_2, ... ]
+
+.. code-block:: yaml
+
+    # app/config/config.yml
+    fos_js_routing:
+        routes_to_expose: [ '[a-z]{2}__RG__route_1', '[a-z]{2}__RG__route_2', ... ]
+
+Note that `Symfony 4.1 added support for internationalized routes`_ out-of-the-box.
+
 You can prevent to expose a route by configuring it as below:
 
 .. code-block:: yaml
@@ -179,3 +197,6 @@ You can enable HTTP caching as below:
             smaxage: null   # integer value, e.g. 300
             expires: null   # anything that can be fed to "new \DateTime($expires)", e.g. "5 minutes"
             vary: []        # string or array, e.g. "Cookie" or [ Cookie, Accept ]
+
+.. _`JMSI18nRoutingBundle`: https://github.com/schmittjoh/JMSI18nRoutingBundle
+.. _`Symfony 4.1 added support for internationalized routes`: https://symfony.com/blog/new-in-symfony-4-1-internationalized-routing