code: def i18n_system_locale():
      
      log.debug('i18n_system_locale() called')
      lc, encoding = locale.getlocale()
      log.debug('locale.getlocale() = (lc="{lc}", encoding="{encoding}).'.format(lc=lc, encoding=encoding))
      if lc is None:
          lc, encoding = locale.getdefaultlocale()
          log.debug('locale.getdefaultlocale() = (lc="{lc}", encoding="{encoding}).'.format(lc=lc, encoding=encoding))
      return lc
docs: Return the system locale
      :return: the system locale (as a string)