docs: def get_i18n_day_name(day_nb, display='short', ln=None):
      """Get the string representation of a weekday, internationalized
  
      @param day_nb: number of weekday UNIX like.
                     => 0=Sunday
      @param ln: language for output
      @return: the string representation of the day
      """
      ln = default_ln(ln)
      _ = gettext_set_language(ln)
      if display == 'short':
          days = {0: _("Sun"),
                  1: _("Mon"),
                  2: _("Tue"),
                  3: _("Wed"),
                  4: _("Thu"),
                  5: _("Fri"),
                  6: _("Sat")}
      else:
          days = {0: _("Sunday"),
                  1: _("Monday"),
                  2: _("Tuesday"),
                  3: _("Wednesday"),
                  4: _("Thursday"),
                  5: _("Friday"),
                  6: _("Saturday")}
  
      return days[day_nb]