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Limits exist on how different languages define family relationships, a new study finds. English describes a mother’s mother and a father’s mother as “grandmother,” and a mother’s father and a father’s father as “grandfather.” New Guinea’s Abelom tongue uses one label for both of a mother’s parents and another term for the father’s. No documented language has a term for a mother’s father and a father’s mother, or for a mother’s mother and a father’s father, perhaps because such categories are overly complicated.
Credit: C. Kemp, T. Regier
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Many Indian languages have a different word for paternal grandfather, paternal grandmother, maternal grandfather and maternal grandmother
And they are spoken by a lot of people too, not at all rare.
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