Added translation info to doc

doc/contributing.rst

@@ -17,7 +17,8 @@ Table of contents
 =================
 
 .. toctree::
-   :maxdepth: 1   
+   :maxdepth: 1
 
    contributing/getting_started
    contributing/plugin_api
+   contributing/translation

doc/contributing/getting_started.rst

@@ -88,6 +88,9 @@ If you want to add a new dependency, just complete the
 It will download and store the required files into the
 :file:`<path_to_local_copy>/modoboa/bower_components` directory.
 
+.. note::
+  Don't forget to regenerate the localization files when you add strings. See :ref:`the translation page <translation>`
+
 New Vue.js interface
 --------------------
 

doc/contributing/translation.rst

@@ -0,0 +1,18 @@
+###########
+Translation
+###########
+
+Modoboa need you to translate the project ! Feel free to join the translation team.
+
+The project is using Transifex. To start with translation, you will need to create an account and join `modoboa's team <https://www.transifex.com/tonio/modoboa/dashboard/>`_
+
+.. _translation:
+
+Frontend
+========
+
+When editing the frontend, you may need to update localization files for transifex to pick up your changes.
+
+To do so, after finishing editing, go to the frontend directory and run the following command::
+
+  $ make makemessages