I feel "The Gaol" sounds like a better/cooler translation than simply "The Prison". I know it's essentially the same thing but still.
It's also a minor plot point later IIRC.
Also Leilei's name is supposed to be "The Prodigal of Feasts".
It's called that not just because her Superior Job is in the Chef family, but because no "Feast" is complete without food or drink. And Leilei leaves her victims either liquidized or in a state like squished raw meat.