hunspell/en.aff comes from http://hunspell.sf.net/,
and has the following copyright and license:

Copyright: 

    Copyright (C) 2005 Daniel Naber
    Copyright (C) 2007 Lazlo Nemeth

License:

This dictionary is based on a subset of the original
English wordlist created by Kevin Atkinson for Pspell 
and  Aspell and thus is covered by his original 
LGPL license.  The affix file is a heavily modified
version of the original english.aff file which was
released as part of Geoff Kuenning's Ispell and as 
such is covered by his BSD license.

  Copyright 1992, 1993, Geoff Kuenning, Granada Hills, CA
  All rights reserved.
  
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:
  
  1. Redistributions of source code must retain the above copyright
     notice, this list of conditions and the following disclaimer.
  2. Redistributions in binary form must reproduce the above copyright
     notice, this list of conditions and the following disclaimer in the
     documentation and/or other materials provided with the distribution.
  3. All modifications to the source code must be clearly marked as
     such.  Binary redistributions based on modified source code
     must be clearly marked as modified versions in the documentation
     and/or other materials provided with the distribution.
  4. All advertising materials mentioning features or use of this software
     must display the following acknowledgment:
       This product includes software developed by Geoff Kuenning and
       other unpaid contributors.
  5. The name of Geoff Kuenning may not be used to endorse or promote
     products derived from this software without specific prior
     written permission.
  
  THIS SOFTWARE IS PROVIDED BY GEOFF KUENNING AND CONTRIBUTORS ``AS IS''
  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL GEOFF KUENNING OR
  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

The full text of the GNU LGPL can be found in the file COPYING-LGPL-2.1
in this directory.
