UI-Router sample, With a root template and child views. Note that URL of homepage is `/` and root has no URL.

ui-router-sample.js

/* Setup Rounting For All Pages */
SApp.config(['$stateProvider', '$locationProvider', '$httpProvider', '$urlRouterProvider', function($stateProvider, $locationProvider, $httpProvider, $urlRouterProvider) {

	$httpProvider.defaults.withCredentials = false;
	$locationProvider.html5Mode(true);

	// Redirect any unmatched url
	$urlRouterProvider.when('', '/');
	$urlRouterProvider.otherwise("/");

        // get app language
	var current_lang = AppSettings.get().CURRENT_LANG;

	$stateProvider

		.state('root', {
			templateUrl: "root." + current_lang + ".html",  // e.g. root.en.html
			controller: "AppController",
		})

		// home
		.state('root.home', {
			url: "/",
			views: {
				'main-content': {
					templateUrl: "main-content." + current_lang + ".html",
					controller: "HomeMainContentController as hmcCtrl"
				},
				'site-header': {
					templateUrl: "site-header." + current_lang + ".html",
				},
				'mega-menu': {}
			}
		});
}]);