PREUN

/bin/sh

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

POSTIN

/bin/sh

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