diff --git a/src/config.js b/src/config.js
index ccd1bdecc..ac1d32380 100644
--- a/src/config.js
+++ b/src/config.js
@@ -7,8 +7,17 @@ const environment = {
   }
 }[process.env.NODE_ENV || 'development'];
 
-const title = 'Al-Qur\'an al-Kareem - القرآن الكريم';
-const description = 'The Quran translated into many languages in a simple and easy interface.';
+const title = "Al-Qur'an al-Kareem - القرآن الكريم";
+const description =
+  'The Quran translated into many languages in a simple and easy interface.';
+const locales = {
+  en: 'English',
+  ar: 'العربية',
+  ur: 'اردو',
+  id: 'Bahasa Indonesia',
+  tr: 'Türkçe',
+  fr: 'Français'
+};
 
 const config = {
   host: process.env.HOST || 'localhost',
@@ -19,7 +28,7 @@ const config = {
   sentryServer: process.env.SENTRY_KEY_SERVER,
   facebookAppId: process.env.FACEBOOK_APP_ID,
   // Supported locales
-  locales: { en: 'English', ar: 'العربية', ur: 'اردو', id: 'Bahasa Indonesia', tr: 'Türkçe', fr: 'Français' },
+  locales,
   defaultLocale: 'en',
   app: {
     head: {
@@ -29,15 +38,27 @@ const config = {
         { 'http-equiv': 'Content-Type', content: 'text/html; charset=utf-8' },
         { 'http-equiv': 'Content-Language', content: 'EN; AR' },
         { name: 'description', content: description },
-        { name: 'keywords', content: 'quran, koran, qur\'an, kareem, قران, القرآن, قران كريم, القران الكريم, surah, yasin, yaseen, kahf, mulk, rahman, muslim, islam, Allah' }, // eslint-disable-line max-l en
+        {
+          name: 'keywords',
+          content: "quran, koran, qur'an, kareem, قران, القرآن, قران كريم, القران الكريم, surah, yasin, yaseen, kahf, mulk, rahman, muslim, islam, Allah"
+        }, // eslint-disable-line max-l en
         { name: 'Charset', content: 'UTF-8' },
         { name: 'Distribution', content: 'Global' },
         { name: 'Rating', content: 'General' },
-        { name: 'viewport', content: 'width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no' },
-        { name: 'google-site-verification', content: 'ehFz7FvmL7V9MzP40F8_kLABhCzqGzMDMrCnUP44Too' },
+        {
+          name: 'viewport',
+          content: 'width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no'
+        },
+        {
+          name: 'google-site-verification',
+          content: 'ehFz7FvmL7V9MzP40F8_kLABhCzqGzMDMrCnUP44Too'
+        },
         { name: 'theme-color', content: '#004f54' },
         { property: 'og:site_name', content: title },
-        { property: 'og:image', content: 'https://quran.com/images/thumbnail.png' },
+        {
+          property: 'og:image',
+          content: 'https://quran.com/images/thumbnail.png'
+        },
         { property: 'og:locale', content: 'en_US' },
         { property: 'og:title', content: title },
         { property: 'og:description', content: description },
@@ -46,10 +67,16 @@ const config = {
         { name: 'twitter:card', content: 'summary' },
         { name: 'twitter:title', content: title },
         { name: 'twitter:description', content: description },
-        { name: 'twitter:image', content: 'https://quran.com/images/thumbnail.png' },
+        {
+          name: 'twitter:image',
+          content: 'https://quran.com/images/thumbnail.png'
+        },
         { name: 'twitter:image:width', content: '200' },
         { name: 'twitter:image:height', content: '200' },
-        { name: 'google-play-app', content: 'app-id=com.quran.labs.androidquran' },
+        {
+          name: 'google-play-app',
+          content: 'app-id=com.quran.labs.androidquran'
+        },
         { name: 'apple-itunes-app', content: 'app-id=1118663303' },
         { name: 'mobile-web-app-capable', content: 'yes' },
         { name: 'apple-mobile-web-app-capable', content: 'yes' },
@@ -60,36 +87,121 @@ const config = {
         { name: 'msapplication-tooltip', content: description },
         { name: 'msapplication-starturl', content: 'https://quran.com' },
         { name: 'msapplication-navbutton-color', content: '#004f54' },
-        { name: 'msapplication-square70x70logo', content: '/mstitle-70x70.jpg' },
-        { name: 'msapplication-square150x150logo', content: '/mstitle-150x150.jpg' },
-        { name: 'msapplication-wide310x150logo', content: '/mstitle-310x150.jpg' },
-        { name: 'msapplication-square310x310logo', content: '/mstitle-310x310.jpg' }
+        {
+          name: 'msapplication-square70x70logo',
+          content: '/mstitle-70x70.jpg'
+        },
+        {
+          name: 'msapplication-square150x150logo',
+          content: '/mstitle-150x150.jpg'
+        },
+        {
+          name: 'msapplication-wide310x150logo',
+          content: '/mstitle-310x150.jpg'
+        },
+        {
+          name: 'msapplication-square310x310logo',
+          content: '/mstitle-310x310.jpg'
+        }
       ],
       link: [
         { rel: 'manifest', href: 'manifest.json' },
-        { rel: 'search', type: 'application/opensearchdescription+xml', href: '/opensearch.xml', title: 'Quran.com' },
-        { rel: 'fluid-icon', href: '/apple-touch-icon-180x180.png', title: 'Quran.com' },
-        { rel: 'icon', type: 'image/png', href: '/favicon-32x32.png', sizes: '32x32' },
-        { rel: 'icon', type: 'image/png', href: '/android-chrome-192x192.png', sizes: '192x192' },
-        { rel: 'icon', type: 'image/png', href: '/favicon-16x16.png', sizes: '16x16' },
+        {
+          rel: 'search',
+          type: 'application/opensearchdescription+xml',
+          href: '/opensearch.xml',
+          title: 'Quran.com'
+        },
+        {
+          rel: 'fluid-icon',
+          href: '/apple-touch-icon-180x180.png',
+          title: 'Quran.com'
+        },
+        {
+          rel: 'icon',
+          type: 'image/png',
+          href: '/favicon-32x32.png',
+          sizes: '32x32'
+        },
+        {
+          rel: 'icon',
+          type: 'image/png',
+          href: '/android-chrome-192x192.png',
+          sizes: '192x192'
+        },
+        {
+          rel: 'icon',
+          type: 'image/png',
+          href: '/favicon-16x16.png',
+          sizes: '16x16'
+        },
         { rel: 'mask-icon', href: '/safari-pinned-tab.svg', color: '#004f54' },
         { rel: 'shortcut icon', href: '/favicon.ico', type: 'image/x-icon' },
         { rel: 'apple-touch-icon', href: 'apple-touch-icon.png' },
-        { rel: 'apple-touch-icon', sizes: '57x57', href: '/apple-touch-icon-57x57.png' },
-        { rel: 'apple-touch-icon', sizes: '72x72', href: '/apple-touch-icon-72x72.png' },
-        { rel: 'apple-touch-icon', sizes: '76x76', href: '/apple-touch-icon-76x76.png' },
-        { rel: 'apple-touch-icon', sizes: '114x114', href: '/apple-touch-icon-114x114.png' },
-        { rel: 'apple-touch-icon', sizes: '120x120', href: '/apple-touch-icon-120x120.png' },
-        { rel: 'apple-touch-icon', sizes: '144x144', href: '/apple-touch-icon-144x144.png' },
-        { rel: 'apple-touch-icon', sizes: '152x152', href: '/apple-touch-icon-152x152.png' },
-        { rel: 'apple-touch-icon', sizes: '180x180', href: '/apple-touch-icon-180x180.png' },
-        { rel: 'preconnect', href: 'https://quran-1f14.kxcdn.com', crossOrigin: '' },
-        { rel: 'preconnect', href: 'https://assets-1f14.kxcdn.com', crossOrigin: '' }
+        {
+          rel: 'apple-touch-icon',
+          sizes: '57x57',
+          href: '/apple-touch-icon-57x57.png'
+        },
+        {
+          rel: 'apple-touch-icon',
+          sizes: '72x72',
+          href: '/apple-touch-icon-72x72.png'
+        },
+        {
+          rel: 'apple-touch-icon',
+          sizes: '76x76',
+          href: '/apple-touch-icon-76x76.png'
+        },
+        {
+          rel: 'apple-touch-icon',
+          sizes: '114x114',
+          href: '/apple-touch-icon-114x114.png'
+        },
+        {
+          rel: 'apple-touch-icon',
+          sizes: '120x120',
+          href: '/apple-touch-icon-120x120.png'
+        },
+        {
+          rel: 'apple-touch-icon',
+          sizes: '144x144',
+          href: '/apple-touch-icon-144x144.png'
+        },
+        {
+          rel: 'apple-touch-icon',
+          sizes: '152x152',
+          href: '/apple-touch-icon-152x152.png'
+        },
+        {
+          rel: 'apple-touch-icon',
+          sizes: '180x180',
+          href: '/apple-touch-icon-180x180.png'
+        },
+        {
+          rel: 'preconnect',
+          href: 'https://quran-1f14.kxcdn.com',
+          crossOrigin: ''
+        },
+        {
+          rel: 'preconnect',
+          href: 'https://assets-1f14.kxcdn.com',
+          crossOrigin: ''
+        },
+        ...Object.keys(locales).map(key => ({
+          rel: 'alternate',
+          hreflang: key,
+          href: `https://quran.com?local=${key}`
+        }))
       ],
       /* SEO: https://developers.google.com/structured-data/slsb-overview#markup_examples */
       /* SEO: https://developers.google.com/structured-data/site-name#markup_requirements */
       script: [
-        { src: 'https://cdn.polyfill.io/v2/polyfill.min.js?features=Intl.~locale.en', async: '', defer: '' },
+        {
+          src: 'https://cdn.polyfill.io/v2/polyfill.min.js?features=Intl.~locale.en',
+          async: '',
+          defer: ''
+        },
         {
           type: 'application/ld+json',
           innerHTML: `{
@@ -120,5 +232,4 @@ const config = {
   ...environment
 };
 
-
 export default config;