# On the host:

$ locale
LANG=ca_ES.UTF-8
LANGUAGE=ca_ES
LC_CTYPE="ca_ES.UTF-8"
LC_NUMERIC=ca_ES.UTF-8
LC_TIME=ca_ES.UTF-8
LC_COLLATE="ca_ES.UTF-8"
LC_MONETARY=ca_ES.UTF-8
LC_MESSAGES="ca_ES.UTF-8"
LC_PAPER=ca_ES.UTF-8
LC_NAME=ca_ES.UTF-8
LC_ADDRESS=ca_ES.UTF-8
LC_TELEPHONE=ca_ES.UTF-8
LC_MEASUREMENT=ca_ES.UTF-8
LC_IDENTIFICATION=ca_ES.UTF-8
LC_ALL=

# On the container:

$ sudo lxc-console -n unity8-lxc

Connected to tty 1
Type <Ctrl+a q> to exit the console, <Ctrl+a Ctrl+a> to enter Ctrl+a itself

Ubuntu Wily Werewolf (development branch) unity8-lxc tty1

unity8-lxc login: dpm
Password: 
Welcome to Ubuntu Wily Werewolf (development branch) (GNU/Linux 3.19.0-21-generic x86_64)

 * Documentation:  https://help.ubuntu.com/
dpm@unity8-lxc:~$ locale
LANG=
LANGUAGE=
LC_CTYPE="POSIX"
LC_NUMERIC="POSIX"
LC_TIME="POSIX"
LC_COLLATE="POSIX"
LC_MONETARY="POSIX"
LC_MESSAGES="POSIX"
LC_PAPER="POSIX"
LC_NAME="POSIX"
LC_ADDRESS="POSIX"
LC_TELEPHONE="POSIX"
LC_MEASUREMENT="POSIX"
LC_IDENTIFICATION="POSIX"
LC_ALL=