The localized message can't be shown on the command line.
The following code in Main.java and BatchEnvironment.java seems to cause
the problem.

    /**
     * Output a string. This can either be an error message or something
     * for debugging. This should be used instead of println.
     */
    public void output(String msg) {
        try {
            int len = msg.length();
            for (int i = 0 ; i < len ; i++) {
                out.write(msg.charAt(i));
            }
            out.write('\n');
        } catch (IOException e) {
        }
    }

This method is used as printing waring, error and usage messages on
the command line.
In the above code, higher byte in unicode is removed and only lower byte
in unicode is sent to output stream because of using OutputStream.write()
method. I don't know why println() can't be used which is mentioned
in the comment field.
If println() can't be used, Write.write() method should be used instead.