Locale Detection: Option to change order about next-intl

[amannn]

Can you include some background on why you'd not want to negotiate the locale based on the accept-language header?

What you can do, is compose the middleware, assign the default locale based on the cookie and turning off localeDetection:

import createIntlMiddleware from 'next-intl/middleware';
import {NextRequest} from 'next/server';
 
export default async function middleware(request: NextRequest) {
  const defaultLocale = request.cookies.get('NEXT_LOCALE')?.value || 'en';
 
  const handleI18nRouting = createIntlMiddleware({
    locales: ['en', 'de'],
    localeDetection: false,
    defaultLocale
  });
  
  return handleI18nRouting(request);
}
 
export const config = {
  matcher: ['/', '/(de|en)/:path*']
};

Therefore if no prefix is available, the cookie value will be used, with ultimately a fallback to en.

Hope this helps!

I'll close this for the time being as additional configuration on the middleware level is currently not intended and there's already a way to achieve this.