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The correct command-line option is --language=hu.1250 (with the ".1250" suffix). This works, as far as I just tested.

There are two small bugs that you found:

  1. Docs [http://pasdoc.sipsolutions.net/OutputLanguage] were wrong. I just corrected them.

  2. Actually, --language=hu doesn't do anything. The text is still in English, and like you noticed the charset is the English iso-8859-1. I'll correct this today (when I'll get home) to show an error message when user passes an unknown language code.