translation.en: It's getting as close as possible to the thought experiment of finding two families both of whom live in Brussels who are identical on every single one of these dimensions, but one of whom speaks Flemish and one of whom speaks French; or two families that live in a rural district in Nigeria, one of whom speaks Hausa and one of whom speaks Igbo.
translation.zh: 让我们假设这个实验找到了 布鲁塞尔的两个家庭， 在别的每个方面都很相似， 但是一个家庭说佛兰芒语另一个家庭说法语； 或是两个住在尼日利亚农村的家庭， 一个说豪萨语另一户说伊博语。