Idioglossia, The Language of the Twins
It has been documented that twin siblings who don't have much contact with other children develop a unique version of the English language, called "idioglossia", because it's idealistic speech. Nell and her late sister May had this form of communication, and I guess the directors put in that the mother's inability to enunciate properly just nurtured the idioglossic way of speaking. It sounds like gibberish to most of us, but it makes perfect sense to the two who speak it. This is why we see the two young girls by the lake reciting their "chickabee" poem. Nell never grew out of it.
Sorta makes me wonder about the Olsen twins....tho' they were famous and had contact with many people at a young age.
~Bez
I was put on this earth to comfort the disturbed and disturb the comforted