pspell_store_replacement()
stores a replacement pair for a word, so that replacement can
be returned by pspell_suggest() later. In order to
be able to take advantage of this function, you have to use
pspell_new_personal() to open the
dictionary. In order to permanently save the replacement
pair, you have to use
pspell_config_personal() and
pspell_config_repl() to set the path where to save
your custom wordlists, and then use
pspell_save_wordlist() for the changes to be written
to disk. Please, note that this function will not work unless
you have pspell .11.2 and aspell .32.5 or later.