What language does the film "Nell" explore, and how does it portray the idea of language isolation?

This shared language is eventually referred to as "Twin Speak" or cryptophasia, which is a phenomenon where twins create their own language that only they can understand. In Nell's case, her language is heavily influenced by her mother's slurred speech, leading to a form of communication that is challenging for others to decipher. For example, Nell frequently uses the term "chickabiddy" to refer to herself or others.