var userLang = navigator.language || navigator.userLanguage;
switch(userLang){
    case 'en':
        window.location.href = 'https://www.google.com';
        break;
    case 'fr':
        window.location.href = 'https://www.okidoo.ca';
        break;
    default:
        window.location.href = 'https://www.google.com';
        break;
}