Furbish is designed to be:
* Limited: It has a small vocabulary and simple grammatical structures.
* Unintelligible: It sounds like a jumble of gibberish to humans.
* Interactive: It is intended to be learned by Furby through interaction with its owner.
Humans cannot understand Furbish because:
* No translation exists: There is no dictionary or grammar guide that can translate Furbish into a human language.
* Sound patterns are unusual: The sounds of Furbish are not based on any known human language.
* Meaning is context-dependent: The meaning of Furbish words and phrases can vary depending on the situation and the Furby's mood.
Instead of trying to understand Furbish, humans can enjoy its playful nature and the interaction it provides with the Furby toy.
Conclusion: Furbish is a fictional language created for entertainment purposes and is not designed to be understood by humans. It's more about the experience of interacting with the Furby toy than understanding its language.