Mention gettext and weblate to update translations

README.md

@@ -169,6 +169,17 @@ type a command like:
 
     EJABBERD_CONFIG_PATH=ejabberd.yml erl -pa ebin -pa deps/*/ebin -pa test -pa deps/elixir/lib/*/ebin/ -s ejabberd
 
+
+Translation
+-----------
+
+Using any gettext editor, you can improve the translation files found in
+`priv/msgs/*.po`, and then submit your changes.
+
+Alternatively, a simple way to improve translations is using our Weblate project:
+https://hosted.weblate.org/projects/ejabberd/ejabberd/
+
+
 Links
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