English to Spanish Art/Literary Cinema, Film, TV, Drama

Hi everyone,

The Rust Belt is translated into Spanish as "el cinturón manufacturero". But I'mt subtitling this for a children's movie (The Muppets), and I don't think it's appropriate in that context. I was thinking of leaving it as it is, since it refers to some regions in the US. Should I use italics or not?
Another option would be to omit the name and translate it as something like "de la zona":

"According to the 80's Robot, he's the richest plumbing magnate in the Rust Belt."

Then:

1) "Según el robot de los 80, es el magnate de la industria plomera más rico de Rust Belt." (with or without italics?)
2) "Según el robot de los 80, es el magnate de la industria plomera más rico de la zona"
3) "Según el robot de los 80, es el magnate plomero más rico de la industria"

Which option would you recommend me for this particular context?

Thanks a lot in advance!