How to set Locale with Remix?

[typytypytypy]

I am having trouble setting locale in my remix app.

When I try to:

import enUS from 'antd-mobile/es/locales/en-US'

I get an error:

import { mergeLocale } from '../utils/merge-locale';
^^^^^^

SyntaxError: Cannot use import statement outside a module
    at Object.compileFunction (node:vm:360:18)
    at wrapSafe (node:internal/modules/cjs/loader:1055:15)
    at Module._compile (node:internal/modules/cjs/loader:1090:27)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1180:10)
    at Module.load (node:internal/modules/cjs/loader:1004:32)
    at Function.Module._load (node:internal/modules/cjs/loader:839:12)
    at Module.require (node:internal/modules/cjs/loader:1028:19)
    at require (node:internal/modules/cjs/helpers:102:18)

I have also tried setDefaultConfig, but that also does not work.

What is the correct way to set the locale for a Remix app?