With a private seller, there is no duty of confidentiality, so the seller can tell one buyer what another buyer is bidding. Buyers do not trust the process so there is no bidding war. You negotiate on your own: When you do it yourself, it is difficult to know what a fair price is for your home.
Linguistic chauvinism is the idea that one's language is superior to others. For a few examples, the Greeks called all non-Greek speakers barbarians, the French are only at home where French is spoken, and English speakers consider the ability to speak another language a social defect.
This is the first page of the 6th edition of their dictionary (1835) Linguistic purism or linguistic protectionism is the practice of defining or recognizing one variety of a language as being purer or of intrinsically higher quality than other varieties.