code: def wind_shear(shear: str, unit_alt: str = 'ft', unit_wind: str = 'kt') -> str:
      
      unit_alt = SPOKEN_UNITS.get(unit_alt, unit_alt)
      unit_wind = SPOKEN_UNITS.get(unit_wind, unit_wind)
      return translate.wind_shear(shear, unit_alt, unit_wind, spoken=True) or 'Wind shear unknown'
docs: Format wind shear string into a spoken word string