How to use the pywws.localisation.set_application_language function in pywws

def hourly(data_dir):
    with pywws.storage.pywws_context(data_dir) as context:
        # localise application
        pywws.localisation.set_application_language(context.params)
        # get weather station data
        pywws.logdata.DataLogger(context).log_data()
        # do the processing
        pywws.process.process_data(context)
        # do tasks
        pywws.regulartasks.RegularTasks(context).do_tasks()
    return 0

print('Error: %s\n' % msg, file=sys.stderr)
        print(__usage__.strip(), file=sys.stderr)
        return 1
    # check arguments
    if len(args) != 3:
        print('Error: 3 arguments required\n', file=sys.stderr)
        print(__usage__.strip(), file=sys.stderr)
        return 2
    # process options
    for o, a in opts:
        if o == '--help':
            print(__usage__.strip())
            return 0
    pywws.logger.setup_handler(1)
    with pywws.storage.pywws_context(args[0]) as context:
        pywws.localisation.set_application_language(context.params)
        return Template(context).make_file(args[1], args[2])