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Twins are reported to create their own language between eachother, called ‘Autonomous’. The words of their language is completely unrecognizable to anyone but themselves.
The Declaration • December 6, 2019 • https://thedeclarationatcoloniahigh.com/43859/fun-factofthe-day/40-of-twins-create-their-own-language/
40% of twins create their own language