PREUN

/bin/sh

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

POSTIN

/bin/sh

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