https://www.amazon.com/dp/0486235971/
RC:
Someone speculated that ethnologists from prior centuries thought their subjects were primitive because of poor or lazy translators (or prejudiced and lazy ethnologists).
I don't think many ethonographers come out of the field without a sense of the greatest respect and reverence for his subjects. His job, is to learn their culture to the extent that they treat him in the same way they would treat any one of themselves, that technique is called "participant observation". And the data is verified, if another person can follow the same methods and get the same results. So I don't think many ethonologists would be "prejudiced and lazy" having gone through that experience.