So it appears that all three primary caregivers -- myself, my wife and our nanny -- were systematically and, I would think, subconsciously restructuring our language to meet him at the birth of a word and bring him gently into more complex language.
つまり ３人の大人たち― 私 妻 おばあさん のだれもが いつも 何げなく 言葉遣いを調整してあげて 息子がその言葉を口にしたら もっと複雑な言葉へ そっと導いていたのです