update

langs/en-US.js

+export default {
+  menu: {
+    about: 'About'
+  }
+}

langs/zh-CN.js

+export default {
+  menu: {
+    about: '关于紫荆'
+  }
+}

middleware/i18n.js

+export default function({ app, store }) {
+  const defaultLocale = app.i18n.fallbackLocale
+  const locale = app.$cookies.get('lang') || defaultLocale
+  store.dispatch('switchLocale', locale)
+}

nuxt.config.js

@@ -81,6 +81,7 @@ export default {
 
   // Plugins to run before rendering page: https://go.nuxtjs.dev/config-plugins
   plugins: [
+    '@/plugins/i18n',
     '@/plugins/axios',
     '@/plugins/element-ui',
     {
@@ -101,14 +102,14 @@ export default {
   buildModules: [],
 
   // Modules: https://go.nuxtjs.dev/config-modules
-  modules: [],
+  modules: ['cookie-universal-nuxt'],
 
   // Build Configuration: https://go.nuxtjs.dev/config-build
   build: {
     transpile: [/^element-ui/]
   },
   router: {
-    middleware: ['device']
+    middleware: ['device', 'i18n']
   }
   // proxy: {
   //   '/api': {