A fonte árabe foi alterada após a instalação do ubuntu-restricted-extras?

Question

Quando instalei o pacote ubuntu-restricted-extras , a fonte Arabic foi alterada no sistema (nomes de arquivo) e dentro dos aplicativos (navegadores da web), portanto, sudo apt-get purge ubuntu-restricted-extras , mas nada foi alterado.

Também tentei editar ~/.font.conf e /etc/fonts/fonts.conf , mas nada acontece.

aqui está /etc/fonts/fonts.conf

<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">

<!-- /etc/fonts/fonts.conf file to configure system font access -->
<fontconfig>

<!--
 DO NOT EDIT THIS FILE.
IT WILL BE REPLACED WHEN FONTCONFIG IS UPDATED.
LOCAL CHANGES BELONG IN 'local.conf'.

The intent of this standard configuration file is to be adequate for
most environments.  If you have a reasonably normal environment and
have found problems with this configuration, they are probably
things that others will also want fixed.  Please submit any
problems to the fontconfig bugzilla system located at fontconfig.org

Note that the normal 'make install' procedure for fontconfig is to
replace any existing fonts.conf file with the new version.  Place
any local customizations in local.conf which this file references.

Keith Packard
 -->

<!-- Font directory list -->

<dir>/usr/share/fonts</dir>
<dir>/usr/local/share/fonts</dir>
<dir prefix="xdg">fonts</dir>
<!-- the following element will be removed in the future -->
<dir>~/.fonts</dir>

<!--
Accept deprecated 'mono' alias, replacing it with 'monospace'
-->
<match target="pattern">
    <test qual="any" name="family">
        <string>mono</string>
    </test>
    <edit name="family" mode="assign" binding="same">
        <string>monospace</string>
    </edit>
   </match>

      <!--
    Accept alternate 'sans serif' spelling, replacing it with 'sans-
     serif'
      -->
   <match target="pattern">
    <test qual="any" name="family">
        <string>sans serif</string>
    </test>
    <edit name="family" mode="assign" binding="same">
        <string>sans-serif</string>
    </edit>
    </match>

   <!--
    Accept deprecated 'sans' alias, replacing it with 'sans-serif'
     -->
    <match target="pattern">
     <cachedir prefix="xdg">fontconfig</cachedir>
    <!-- the following element will be removed in the future -->
     <cachedir>~/.fontconfig</cachedir>

    <config>
    <!--
    Rescan configuration every 30 seconds when FcFontSetList is called
     -->
    <rescan>
        <int>30</int>
    </rescan>
    </config>

    </fontconfig>



    <test qual="any" name="family">
        <string>sans</string>
    </test>
    <edit name="family" mode="assign" binding="same">
        <string>sans-serif</string>
    </edit>
    </match>

 <!--
  Load local system customization file
 -->
    <include ignore_missing="yes">conf.d</include>

  <!-- Font cache directory list -->

  <cachedir>/var/cache/fontconfig</cachedir>
     <cachedir prefix="xdg">fontconfig</cachedir>
    <!-- the following element will be removed in the future -->
    <cachedir>~/.fontconfig</cachedir>

   <config>
    <!--
   Rescan configuration every 30 seconds when FcFontSetList is called
   -->
    <rescan>
        <int>30</int>
    </rescan>
    </config>

   </fontconfig>

A fonte em inglês em todos os aplicativos e no sistema não mudou!

Como posso retornar a fonte normal do Ubuntu Arabic!