I am reading "Pilgrim Among the Shadows" by Boris Pahor (Orlando, FL, 1995, Harcourt Brace & Co.), a translation by Michael Biggins from the Slovenian of "Nekropola." It appears to be the only work by Pahor to have been translated into English.

Pahor's experience was in Natzweiler -- and later in Dachau. He tells the
grisly tale of how Italy persecuted the speakers of Slovenian and
Serbo-Croatian in the areas it annaxed after World War I and expanded into after the outbreak of World War II. For Pahor, a Triestino Jew barred from speaking his own language and whose main memories are of gravestones on which the names were italianized and of the main Slovenian library in Trieste being burned to the ground by blackshirted fascists, Natzweiler (he does not explain why he ended in that camp high in the Vosges mountains of France) proved that the ties among "Yugoslavs" were strong despite the signs of breakup after the death of Tito.

This is a literary memoir -- awfully hard to read with constant flashbacks
from present to past and back again -- that does flesh out some horrors.
For example, the hot water in the showers at Natzweiler came from boilers placed above the crematorium ovens (something I did not find in
Buchenwald).

Peculiarly, Pahor hardly mentions his own Jewishness.