do you know which it is using, eg ispell, aspell, or something else?
victoria@victoria:~$ enchant -v @(#) International Ispell Version 3.1.20 (but really Enchant 1.6.0)
victoria@victoria:~$ man ispell No manual entry for ispell
victoria@victoria:~$ man aspell # launches aspell manual
btw, my en_CA.dic is large (14,860 items)