Goblins in general have a language more devoted to function over form than most human tongues. Names of places and things are often concatenations of nouns or simple phrases. Phonetics are not as commonly used. Personal names are occasionally pure phonetics as well as shortened phrases that no longer have intrinsic meaning, but for places and things, this is uncommon. The separation between names and titles in non-people is slight in most goblin tongues.
Bloodharvest itself was named so because it was what goblins call a prison and what humans would call an extermination camp. The prisoners were inflicted with needless cruelty in the form of toil. While literal efforts were devoted to digging, the end goal of such labor was death of the prisoners. Their blood was harvested.
Complexity arose as it does in all aspects of goblin society by the effects of Krat. All fights are one on one in Krat. Astrologamage Elegy found no humans or elves in Bloodharvest other than Aehr’s comrades, but a great many goblin prisoners. These prisoners could not be executed explicitly, for in Krat they could fight their captors one on one until death or freedom. The combination of beating, starvation, and the perils of unsafe digging itself executed the prisoners instead.
The Temple of Luminance is another goblin location. That is the location’s name, and it is important to keep in mind that the distinction between ‘Temple of Luminance’ as a proper noun and temple as a title with luminance a modifier simply isn’t a strong distinction. Another location called the Temple of Thunder is not necessarily closer connection to the Temple of Luminance than two men, George Phillips and George Smith, are because they share a given name.