This process is documented at length in the book 1984, including a special appendix dedicated specifically to what the author termed "Newspeak" and "doublethink

This process is documented at length in the book 1984, including a special appendix dedicated specifically to what the author termed "Newspeak" and "doublethink", or "doublespeak". https://en.m.wikipedia.org/wiki/Newspeak https://en.m.wikipedia.org/wiki/Newspeak