code: func NewDefaultLanguage(cfg config.Provider) *Language {
  	defaultLang := cfg.GetString("defaultContentLanguage")
  
  	if defaultLang == "" {
  		defaultLang = "en"
  	}
  
  	return NewLanguage(defaultLang, cfg)
  }
docs: // NewDefaultLanguage creates the default language for a config.Provider.
  // If not otherwise specified the default is "en".