事实上，我们语言中的lean也是来源同样的印欧语系。
In fact our word lean evolved from the same Indo-European root.
他们说的全是同一种语言的不同变体，以前肯定都属于印欧语系语言。
They all spoke variants of what once must have been the same language, Aryan.
专家说那个地区的人使用一种叫做古印欧语的语言。
Experts say the people in that area spoke a language called Proto-Indo-European.
专家说那个地区的人使用一种叫做古印欧语的语言。
Experts say the people in that area spoke a language called Proto-Indo-European.
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