[install-guide/F21-rewrite] Expanding description of the inst.lang= boot option

[pbokoc]

commit 6a2843f491f8910159b0d275767746f40162c64e
Author: Petr Bokoc <pbokoc at redhat.com>
Date:   Fri Oct 10 17:48:36 2014 +0200

    Expanding description of the inst.lang= boot option

 en-US/Boot_Options.xml |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/en-US/Boot_Options.xml b/en-US/Boot_Options.xml
index 2e7bc03..f3edbef 100644
--- a/en-US/Boot_Options.xml
+++ b/en-US/Boot_Options.xml
@@ -316,6 +316,9 @@
                         <para>
                             Sets the language to be used during the installation. Language codes are the same as the ones used in the <command>lang</command> Kickstart command as described in <xref linkend="sect-kickstart-commands-lang" />. On systems where the <package>system-config-language</package> package is installed, a list of valid values can also be find in <filename>/usr/share/system-config-language/locale-list</filename>.
                         </para>
+                        <para>
+                        	If you perform the installation interactively, the language you specified using this option will be selected by default, but you will still be able to change it at the beginning of the graphical installation.
+                        </para>
                     </listitem>
                 </varlistentry>
                 <varlistentry>