how to able localeDetection with App Router setup without i18n routing

[cleitonBarros]

How can I set localeDetection with App Router setup without i18n routing, i am using this example https://github.com/amannn/next-intl/tree/main/examples/example-app-router-without-i18n-routing

'use server';

import {cookies} from 'next/headers';
import {Locale, defaultLocale} from '@/i18n/config';

const COOKIE_NAME = 'NEXT_LOCALE';

export async function getUserLocale() {
  return cookies().get(COOKIE_NAME)?.value || defaultLocale;
}

export async function setUserLocale(locale: Locale) {
  cookies().set(COOKIE_NAME, locale);
}

export type Locale = (typeof locales)[number];

export const locales = ['pt-BR', 'en'] as const;
export const defaultLocale: Locale = 'pt-BR';