Thanks for your report.
The only error in your log is
=====
dpkg: error processing language-pack-ar (--configure):
package language-pack-ar is already installed and configured
=====
Not much to tell...
Could you please open a terminal and run the following command:
apt-get install --reinstall language-pack-ar
and report if this helps.
Thanks.
** Changed in: language-pack-ar (Ubuntu)
Status: New => Incomplete
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package language-pack-ar 1:8.10+20081025 failed to install/upgrade: package
language-pack-ar is already installed and configured
https://bugs.launchpad.net/bugs/291755
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