.Vt locale_t
value that corresponds to the global, process-wide locale.
.It
+LC_C_LOCALE - A special
+.Vt locale_t
+value that corresponds to the C, system locale.
+.It
MB_CUR_MAX - This macro is traditionally defined as an integer
containing the value of the longest multi-byte string
that a single-wide character in the global locale can translate into.