English language locale for Belgium on Ubuntu, Debian and others linux systems sudo cp en_BE /usr/share/i18n/locales/en_BE sudo localedef -i en_BE -c -f UTF-8 en_BE echo "en_BE.UTF-8 UTF-8" | sudo tee -a /etc/locale.gen sudo locale-gen Maybe also change files in /var/lib/locales/supported.d/