code: def _set_lang_settings(self, lang_settings):
          
          is_int = isinstance(lang_settings, int)
          is_dict = isinstance(lang_settings, dict)
          if not is_int and not is_dict:
              raise TypeError(("Settings 'READTIME_WPM' must be either an int,"
                               "or a dict with settings per language."))
  
          # For backwards compatability reasons we'll allow the
          # READTIME_WPM setting to be set as an to override just the default
          # set WPM.
          if is_int:
              self.lang_settings['default']['wpm'] = lang_settings
          elif is_dict:
              for lang, conf in lang_settings.items():
                  if 'wpm' not in conf:
                      raise KeyError(('Missing wpm value for the'
                                      'language: {}'.format(lang)))
  
                  if not isinstance(conf['wpm'], int):
                      raise TypeError(('WPM is not an integer for'
                                       ' the language: {}'.format(lang)))
  
                  if "min_singular" not in conf:
                      raise KeyError(('Missing singular form for "minute" for'
                                      ' the language: {}'.format(lang)))
  
                  if "min_plural" not in conf:
                      raise KeyError(('Missing plural form for "minutes" for'
                                      ' the language: {}'.format(lang)))
  
                  if "sec_singular" not in conf:
                      raise KeyError(('Missing singular form for "second" for'
                                      ' the language: {}'.format(lang)))
  
                  if "sec_plural" not in conf:
                      raise KeyError(('Missing plural form for "seconds" for'
                                      ' the language: {}'.format(lang)))
  
              self.lang_settings = lang_settings
docs: Checks and sets the per language WPM, singular and plural values.