Better explanation

Author: javiereguiluz

contributing/translations/index.rst

@@ -20,9 +20,15 @@ some missing Swedish translations to contribute them.
 Symfony repository. Visit the `Symfony Releases`_ page to find out which is the
 current oldest maintained branch.
 
-If you know Git well, clone the Symfony repository and check out that branch.
-Otherwise, visit `https://github.com/symfony/symfony <https://github.com/symfony/symfony>`_
-and switch to that branch.
+Then, you need to either download or browse that Symfony version contents:
+
+* If you know Git and prefer the command console, clone the Symfony repository
+  and check out the oldest maintained branch (read the
+  :doc:`Symfony Documentation contribution guide </contributing/documentation/overview>`
+  if you want to learn about this process);
+* If you prefer to use a web based interface, visit
+  `https://github.com/symfony/symfony <https://github.com/symfony/symfony>`_
+  and switch to the oldest maintained branch.
 
 **Step 2.** Check out if there's some missing translation in your language by
 checking these directories: