mario@NotebookMPB:~ > sudo apt-get purge locales
[sudo] password for mario:
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
  audacity-data kde-l10n-pt libid3tag0 libportsmf0 libsbsms10 libsoxr0
  libvamp-hostsdk3
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
  language-pack-en* language-pack-en-base* language-pack-gnome-en*
  language-pack-gnome-en-base* language-pack-gnome-pt*
  language-pack-gnome-pt-base* language-pack-kde-en* language-pack-kde-pt*
  language-pack-pt* language-pack-pt-base* libreoffice-help-pt*
  libreoffice-help-pt-br* libreoffice-l10n-pt* libreoffice-l10n-pt-br*
  locales* ubuntu-minimal*
0 upgraded, 0 newly installed, 16 to remove and 0 not upgraded.
After this operation, 114 MB disk space will be freed.
Do you want to continue? [Y/n] y
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = "",
        LC_ALL = (unset),
        LC_TIME = "",
        LC_MONETARY = ""C"",
        LC_ADDRESS = ""C"",
        LC_TELEPHONE = ""C"",
        LC_NAME = ""C"",
        LC_MEASUREMENT = ""C"",
        LC_IDENTIFICATION = ""C"",
        LC_NUMERIC = ""C"",
        LC_PAPER = ""C"",
        LANG = "pt_BR.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Não foi possível atribuir LC_ALL à localização padrão: Arquivo ou diretório não encontrado
(Reading database ... 199863 files and directories currently installed.)
Removing language-pack-kde-en (1:14.04+20140305.0ubuntu1) ...
Removing language-pack-kde-pt (1:14.04+20140305.0ubuntu1) ...
Removing libreoffice-help-pt (1:4.2.7-0ubuntu1) ...
Removing libreoffice-help-pt-br (1:4.2.7-0ubuntu1) ...
Removing libreoffice-l10n-pt (1:4.2.7-0ubuntu1) ...
Removing libreoffice-l10n-pt-br (1:4.2.7-0ubuntu1) ...
Removing ubuntu-minimal (1.325) ...
Removing language-pack-gnome-pt-base (1:14.04+20140410) ...
Purging configuration files for language-pack-gnome-pt-base (1:14.04+20140410) ...
Removing language-pack-pt-base (1:14.04+20140410) ...
Purging configuration files for language-pack-pt-base (1:14.04+20140410) ...
Removing language-pack-gnome-en-base (1:14.04+20150219) ...
Purging configuration files for language-pack-gnome-en-base (1:14.04+20150219) ...
Removing language-pack-en-base (1:14.04+20150219) ...
Purging configuration files for language-pack-en-base (1:14.04+20150219) ...
dpkg: warning: while removing language-pack-en-base, directory '/var/lib/locales/supported.d' not empty so not removed
Removing language-pack-gnome-pt (1:14.04+20140410) ...
Removing language-pack-pt (1:14.04+20140410) ...
Removing locales (2.13+git20120306-12.1) ...
Purging configuration files for locales (2.13+git20120306-12.1) ...
Removing language-pack-gnome-en (1:14.04+20150219) ...
Removing language-pack-en (1:14.04+20150219) ...
Processing triggers for man-db (2.6.7.1-1ubuntu1) ...
mario@NotebookMPB:~ > sudo aptitude install locales
The following NEW packages will be installed:
  locales
The following packages will be REMOVED:
  audacity-data{u} kde-l10n-pt{u} libid3tag0{u} libportsmf0{u} libsbsms10{u} libsoxr0{u} libvamp-hostsdk3{u}
0 packages upgraded, 1 newly installed, 7 to remove and 0 not upgraded.
Need to get 2695 kB of archives. After unpacking 22.8 MB will be freed.
Do you want to continue? [Y/n/?] y
Get: 1 http://archive.ubuntu.com/ubuntu/ trusty-updates/main locales all 2.13+git20120306-12.1 [2695 kB]
Fetched 2695 kB in 9s (299 kB/s)
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = "",
        LC_ALL = (unset),
        LC_TIME = "",
        LC_MONETARY = ""C"",
        LC_ADDRESS = ""C"",
        LC_TELEPHONE = ""C"",
        LC_NAME = ""C"",
        LC_MEASUREMENT = ""C"",
        LC_IDENTIFICATION = ""C"",
        LC_NUMERIC = ""C"",
        LC_PAPER = ""C"",
        LANG = "pt_BR.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_CTYPE to default locale: No such file or directory
locale: Cannot set LC_MESSAGES to default locale: No such file or directory
locale: Cannot set LC_ALL to default locale: No such file or directory
(Reading database ... 193873 files and directories currently installed.)
Removing audacity-data (2.0.5-1ubuntu3.2) ...
Removing kde-l10n-pt (4:4.14.2-0ubuntu1) ...
Removing libid3tag0 (0.15.1b-10ubuntu1) ...
Removing libportsmf0:amd64 (0.1~svn20101010-4) ...
Removing libsbsms10:amd64 (2.0.1-1) ...
Removing libsoxr0:amd64 (0.1.1-1) ...
Removing libvamp-hostsdk3:amd64 (2.5+repack0-2) ...
Processing triggers for hicolor-icon-theme (0.13-1) ...
Processing triggers for shared-mime-info (1.2-0ubuntu3) ...
Unknown media type in type 'all/all'
Unknown media type in type 'all/allfiles'
Unknown media type in type 'uri/mms'
Unknown media type in type 'uri/mmst'
Unknown media type in type 'uri/mmsu'
Unknown media type in type 'uri/pnm'
Unknown media type in type 'uri/rtspt'
Unknown media type in type 'uri/rtspu'
Processing triggers for man-db (2.6.7.1-1ubuntu1) ...
Processing triggers for libc-bin (2.19-0ubuntu6.6) ...
Selecting previously unselected package locales.
(Reading database ... 191604 files and directories currently installed.)
Preparing to unpack .../locales_2.13+git20120306-12.1_all.deb ...
Unpacking locales (2.13+git20120306-12.1) ...
Processing triggers for man-db (2.6.7.1-1ubuntu1) ...
Setting up locales (2.13+git20120306-12.1) ...
Generating locales...
  en_US.UTF-8... done
  pt_BR.UTF-8... done
Generation complete.

mario@NotebookMPB:~ > sudo dpkg-reconfigure locales
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
        LANGUAGE = "",
        LC_ALL = (unset),
        LC_PAPER = ""C"",
        LC_ADDRESS = ""C"",
        LC_MONETARY = ""C"",
        LC_NUMERIC = ""C"",
        LC_TELEPHONE = ""C"",
        LC_IDENTIFICATION = ""C"",
        LC_MEASUREMENT = ""C"",
        LC_TIME = "",
        LC_NAME = ""C"",
        LANG = "pt_BR.UTF-8"
    are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_ALL to default locale: No such file or directory
Generating locales...
  en_US.UTF-8... up-to-date
  pt_BR.UTF-8... up-to-date
Generation complete.
mario@NotebookMPB:~ >