pspell_config_repl() should be
used on a config before calling
pspell_new_config(). The replacement pairs improve
the quality of the spellchecker. When a word is misspelled,
and a proper suggestion was not found in the list,
pspell_store_replacement() can be used to store a
replacement pair and then
pspell_save_wordlist() to save the wordlist along
with the replacement pairs. The file should be writable by
whoever php runs as (e.g. nobody). Please, note that this
function will not work unless you have pspell .11.2 and
aspell .32.5 or later.