PREUN

/bin/sh

if [[ "$1" = "0" ]]; then
  perl -ni -e "/^DICT\s*en\s*AU\s*en_AU$/ or print" /usr/share/dict/ooo/dictionary.lst
fi

POSTIN

/bin/sh

if [[ ! -f "/usr/share/dict/ooo/dictionary.lst" ]] ||       ! grep -q "^DICT[ \t]*en[ \t]*AU[ \t]*en_AU" /usr/share/dict/ooo/dictionary.lst
then
  echo "DICT en AU en_AU" >> /usr/share/dict/ooo/dictionary.lst
fi