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. ”
تذكر مجلة العالِم الاميركي على الانترنت :‏ « يتمكن الاطفال من تعلّم اللغة حتى لو لم يتكلم معهم والدوهم مباشرة .‏