This is an enormously painful setup and generally a painful program. But its a limited choice world it seems.
Install aspell is pretty simple. /usr/ports/textproc/aspell
We then want to get dictionaries - which are word lists in specific formats. The only place to get these and remain sane is http://ftp.gnu.org/gnu/aspell/dict/en
After untarring, we run:
$ ./configure Finding Dictionary file location ... /usr/local/share/aspell Finding Data file location ... /usr/local/lib/aspell-0.60 $ sudo make $ sudo make install
Now if we look in /usr/local/share/aspell we have a huge list of english words in aspell formats.
Using it with emacs:
M-$ or M-x flyspell-mode