People asked to translate the States, because they had a use case, but
it's a minority. But other people also had issues on addresses because
states were translated. Translated fields can introduce mistakes.
Example: if I send a letter to: "Virginie-Occidentale", will United
States postal services understand that they actually have to send to
"West-Virginia"? That's an easy one, but there are more tricky ones.
Translations induce a lot of mismatch when people duplicate or edit.
Suppose a user edit "New-York" state and rename into "Californie"
because they do a mistake while changing the address of a partner the
same customer might receive it's letter in New-York or California,
depending on the language. Having states being translated might lead to
more issues, than not translated.