[pyuser583]

We also use the phrase “concentration camp” (Konzentrationslager) to refer to death camps.

Which is really weird as it’s not a common English phase, and seems to be a straight copy of Nazi propaganda.

[throwawaybutwhy]

Not entirely correct, I'm afraid. Concentration camps were inaugurated by the Spanish and popularized by the British. Co-location of killing facilities and camps was not a common occurrence even in Germany, so there were many more concentration camps than death camps.