you leave it unset, Mutt will attempt to use isprint() if either
of the environment variables LANG, LC_ALL or LC_CTYPE is set,
and will revert to the ISO-8859-* range if they aren't.
+ If you need --enable-locales-fix then you will probably need
+ --without-wc-funcs too. However, on a correctly configured
+ modern system you shouldn't need either (try setting LANG,
+ LC_ALL or LC_CTYPE instead).
--without-wc-funcs
by default Mutt uses the functions mbrtowc(), wctomb() and