#include <libintl.h>
char *dngettext(const char *domainname, const char *msgid1, const char *msgid2, unsigned long int n);
char *dngettext
dngettext shall be equivalent to a call to
dngettext
dcngettext(domainname, msgid1, msgid2, n, LC_MESSAGES)
dgettext
gettext, dgettext, ngettext, dcgettext, dcngettext, textdomain, bindtextdomain, bind_textdomain_codeset