PREUN

/bin/sh

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

POSTIN

/bin/sh

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