This dictionary is based on the Czech ispell dictionary version 20040229

From czech.aff:

# $Id: czech.aff,v 0.80 2004/02/29  23:55:03 $
# Czech affix table for ispell
# Copyright (C) 1998-2004 Petr Kolář <Petr.Kolar@vslib.cz>
# Copyright (C) 1996-1997 Tomáš Čermák <Cermak@fsv.cvut.cz>
# UTF-8 support Copyright (C) 2003 Jiri Hladky, hladky.jiri@seznam.cz
#
# Contributors to the Czech dictionary:
#   1996-1997  Tomáš Čermák <Cermak@fsv.cvut.cz> (original author)
#   1997       Petr Prenghy <Petr.Prenghy@cesnet.cz>
#   1997/02/02 Hanuš Adler <had@pdas.cz>
#   1998-2004  Petr Kolář <Petr.Kolar@vslib.cz>
#   and many others that sent unknown words
#
# Current version ftp://ftp.vslib.cz/pub/unix/ispell/czech/
# Older version http://hlava22.fsv.cvut.cz/~cermak/ispell/
#
#    This data file and the enclosed Czech dictionary files for
#    ispell are free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License version 2
#    as published by the Free Software Foundation.
#
#    These files are distributed in the hope that they will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program; if not, write to the Free Software Foundation, 
#    Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA