The online journal American Scientist says: “Toddlers manage to acquire language even when their parents don’t talk to them directly; deaf children will go so far as to invent their own sign languages if they are not exposed to sign at home. ”
और कुछ बधिर बच्चे, जिन्हें घर पर साइन लैग्वैज़ नहीं सिखायी जाती, वे अपने ही इशारों की एक नयी भाषा बना लेते हैं । ”