I love that kind of language variations.
From what I understand, the Yahi of Northern California had four languages; one for men, one for women, one for women talking to men, and one for men talking to women.
Four different words for hat; man talking of men's hat, woman talking of women's hat, man talking of women's hat, woman talking of man's hat.
None of the different languages were 'higher' or 'lower'. It was considered a form of politeness to use the right language.
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