Getopt supports error messages in the following languages:

English (default)
Czech
Dutch
French
German
Hungarian
Italian
Japanese
Norwegian
Polish
Romanian
Spanish

Anyone can create a translation without knowing how to program Java.
Simply supply me with a MessagesBundle file for your locale and I'm happy
to include it.  See MessagesBundle.properties as an example with reference
English messages.

Aaron (arenn@urbanophile.com)