There may be some circumstances where --help or -h should perform their .on("--help") duties, but we may not want to print out the automatic help message.

.help is already a method, so I propose a method like .helpFlags that you could include in the usual parse chain that would take overriding help flags as an argument. --help and -h would still work by default, but you could do .helpFlags("-a, --ayudar") to use those instead or even .helpFlags() to prevent anything from outputting the help automatically.