[ADD] website: How to translate the website?

https://docs.google.com/document/d/12uTlsfL09FD9cP71UF5CAKvxcSaQKQ4N44f6up-W4s4/edit

website.rst

@@ -9,3 +9,4 @@ Website
 
    website/seo
    website/google_analytics
+   website/translate_website

website/translate_website.rst

@@ -0,0 +1,64 @@
+===============================
+How can I translate my website?
+===============================
+
+Overview
+========
+
+In addition to creating great modern websites, Odoo gives you the
+possibility to translate it in different languages.
+
+Process
+=======
+
+Once your website is created, you have the opportunity to translate it
+in as many different languages as you want.
+
+There are two ways to translate your website, you can do it manually or
+automatically with the Gengo App. If you want to do it automatically, go
+to the **App** module and Install **Automated translations through Gengo
+Api** and **Website Gengo Translator**. If you want to do it manually,
+don't install anything, and follow the next step.
+
+Now go to your website. On the bottom right corner of the page, click on
+**Add a language**.
+
+.. image:: media/translate_website01.png
+    :align: center
+
+Choose the language in which you want to translate your website and then
+click on **Load.**
+
+.. image:: media/translate_website02.png
+    :align: center
+
+You will see that Now, next to English there is also French, which means
+that the page for the translation has been created. You can also see
+that some of the text has been translated automatically.
+
+.. image:: media/translate_website03.png
+    :align: center
+
+To translate the content of the website, click on **Translate** (here
+**Traduire** since we want to translate the website in French).
+
+There, if you have installed the Gengo Translator, You will see that
+next to the **Translate** button you also have a button **Translate
+automatically**. Once you click on that button, you will be asked some
+information on your account. If you don't have an account yet, go to
+`*https://gengo.com/auth/form/login/* <https://gengo.com/auth/form/login/>`__
+in order to create one. You need to ask for a public key and a private
+key.
+
+The content you wish to translate will then be translated automatically.
+
+.. image:: media/translate_website04.png
+    :align: center
+
+Now you can see that most of the content is highlighted in yellow or
+in green. The yellow represents the content that you have to translate by
+yourself. The green represents the content that has already been translated
+automatically.
+
+.. image:: media/translate_website05.png
+    :align: center