@applicaster/zapp-react-native-utils/localizationUtils/deviceLocales.ios.ts

Applicaster Zapp React Native utilities package

import * as R from "ramda";
import { NativeModules } from "react-native";

export function getDeviceLocales() {
  const { settings } = NativeModules.SettingsManager.getConstants();

  return R.compose(
    R.map(R.compose(R.head, R.split("-"))),
    R.prop("AppleLanguages")
  )(settings);
}