Pablo Saratxaga wrote:
There are dictionnaries for aspell for 76 different languages, and of course more can be added; look at: http://aspell.sourceforge.net/man-html/Supported.html
But not all Aspell dictionaries are free. This is an area where Wiktionary and the Wikimedia Foundation could make a difference. For example, download the English dictionaries in ftp://ftp.gnu.org/gnu/aspell/dict/en/aspell6-en-6.0-0.tar.bz2 and read the enclosed text file named "Copyright".