I tried to follow the instructions on this post, but it did not work for me, what I'm doing wrong? Here's my local file in /etc/default/locale
# File generated by update-locale
LANG="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_GB.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_PAPER="en_US.UTF-8"
LC_NAME="en_US.UTF-8"
LC_ADDRESS="en_US.UTF-8"
LC_TELEPHONE="en_US.UTF-8"
LC_MEASUREMENT="en_US.UTF-8"
LC_IDENTIFICATION="en_US.UTF-8"