new: Add language installation

source/new.rst

@@ -15,3 +15,8 @@ Résumé changes
 |resume| Education and employment histories are now separate menu items to be able to deal better with dragging and dropping files.
 
 You can attach files on an education or employment history item or an achievement either directly from your Mahara files area or by uploading a file from your device.
+
+Install languages in the site administration
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+|languages| Site administrators can install `any translation of Mahara <https://translations.launchpad.net/mahara-lang/>`_ directly in the :ref:`site administration area <languages>`. Languages can also be updated there. The translations make the interface available in languages other than English. No matter the interface language though, account holders can type text in any language.

source/shortcuts.rstext

@@ -533,3 +533,7 @@
 .. |resume| raw:: html
 
    <i class="fas fa-upload fa-3x fa-pull-left new_icon" aria-hidden="true"></i>
+
+.. |languages| raw:: html
+
+   <i class="fas fa-language fa-3x fa-pull-left new_icon" aria-hidden="true"></i>