This is the “do not internationalize” option. Do not produce internationalized shell archives, use default English messages. By default, shar produces archives that will try to output messages in the unpackers preferred language (as determined by the LANG/LC_MESSAGES environmental variables) when they are unpacked. If no message file for the unpackers language is found at unpack time, messages will be in English.
This is the “print directory with shar messages” option. Prints the directory shar looks in to find messages files for different languages, then immediately exits.