The API has been updated to include 2 new fields in the currency section: name_native and plural_native.

The existing fields name and plural are returning, respectively, the currency name and plural name in US locale. The new fields return value in native locale based on detected location and primary language.

Here is an example for an IP address located in Tokyo:

"currency" : {
  "code" : "JPY",
  "name" : "Japanese Yen",
  "name_native" : "日本円",
  "plural" : "Japanese yen",
  "plural_native" : "円",
  ...
}

Official client libraries have been updated to reflect the changes.