diff --git a/app/package.json b/app/package.json
index c44e96f..642ad6b 100644
--- a/app/package.json
+++ b/app/package.json
@@ -26,6 +26,7 @@
     "socket.io-client": "^4.7.1",
     "validator": "^13.11.0",
     "vue": "^3.3.4",
+    "vue-i18n": "11.3.0",
     "vue-router": "^4.2.4",
     "vue-toastification": "^2.0.0-rc.5",
     "vue3-lottie": "^3.2.0",
diff --git a/app/src/i18n/index.ts b/app/src/i18n/index.ts
new file mode 100644
index 0000000..4a9cc80
--- /dev/null
+++ b/app/src/i18n/index.ts
@@ -0,0 +1,41 @@
+import { createI18n } from 'vue-i18n'
+import en from './locales/en.json'
+import zhTW from './locales/zh-TW.json'
+
+export const supportedLocales = ['zh-TW', 'en'] as const
+
+export type SupportedLocale = (typeof supportedLocales)[number]
+
+function isSupportedLocale(locale: string): locale is SupportedLocale {
+  return supportedLocales.includes(locale as SupportedLocale)
+}
+
+function getInitialLocale(): SupportedLocale {
+  const savedLocale = localStorage.getItem('locale')
+
+  if (savedLocale && isSupportedLocale(savedLocale)) {
+    return savedLocale
+  }
+
+  return navigator.language.startsWith('zh') ? 'zh-TW' : 'en'
+}
+
+const initialLocale = getInitialLocale()
+
+document.documentElement.lang = initialLocale
+
+export const i18n = createI18n({
+  legacy: false,
+  locale: initialLocale,
+  fallbackLocale: 'zh-TW',
+  messages: {
+    'zh-TW': zhTW,
+    en,
+  },
+})
+
+export function setLocale(locale: SupportedLocale) {
+  i18n.global.locale.value = locale
+  localStorage.setItem('locale', locale)
+  document.documentElement.lang = locale
+}
diff --git a/app/src/i18n/locales/en.json b/app/src/i18n/locales/en.json
new file mode 100644
index 0000000..0967ef4
--- /dev/null
+++ b/app/src/i18n/locales/en.json
@@ -0,0 +1 @@
+{}
diff --git a/app/src/i18n/locales/zh-TW.json b/app/src/i18n/locales/zh-TW.json
new file mode 100644
index 0000000..0967ef4
--- /dev/null
+++ b/app/src/i18n/locales/zh-TW.json
@@ -0,0 +1 @@
+{}
diff --git a/app/src/main.ts b/app/src/main.ts
index 6e918ff..a0a869d 100644
--- a/app/src/main.ts
+++ b/app/src/main.ts
@@ -1,18 +1,15 @@
 import { createApp } from 'vue'
 import { createPinia } from 'pinia'
-
-import './style.css'
-/* import font awesome icon component */
-import { FontAwesomeIcon } from '@fortawesome/vue-fontawesome'
-import './library'
-/* import Vue Toastification */
-import Toast, { POSITION } from 'vue-toastification'
-/* import Vue Lottie */
-import Vue3Lottie from 'vue3-lottie'
+import { FontAwesomeIcon } from '@fortawesome/vue-fontawesome' // import font awesome icon component
+import { i18n } from './i18n'
+import Toast, { POSITION } from 'vue-toastification' // import Vue Toastification
+import Vue3Lottie from 'vue3-lottie' // import Vue Lottie
 import 'vue-toastification/dist/index.css'
 import App from './App.vue'
 import router from './router'
 import formbricks from './utils/formbricks'
+import './style.css'
+import './library'
 
 const app = createApp(App)
 const pinia = createPinia()
@@ -21,6 +18,7 @@ app.component('font-awesome-icon', FontAwesomeIcon)
 
 app.use(pinia)
 app.use(router)
+app.use(i18n)
 
 router.afterEach(() => {
   if (typeof formbricks !== 'undefined') {
diff --git a/yarn.lock b/yarn.lock
index ee06019..42bd41c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1306,6 +1306,36 @@
   resolved "https://registry.yarnpkg.com/@humanwhocodes/object-schema/-/object-schema-2.0.3.tgz#4a2868d75d6d6963e423bcf90b7fd1be343409d3"
   integrity sha512-93zYdMES/c1D69yZiKDBj0V24vqNzB/koF26KPaagAfd3P/4gUlh3Dys5ogAK+Exi9QyzlD8x/08Zt7wIKcDcA==
 
+"@intlify/core-base@11.3.0":
+  version "11.3.0"
+  resolved "https://registry.yarnpkg.com/@intlify/core-base/-/core-base-11.3.0.tgz#55e612501f08b564011cb16d9f4a08e9a05df3cb"
+  integrity sha512-NNX5jIwF4TJBe7RtSKDMOA6JD9mp2mRcBHAwt2X+Q8PvnZub0yj5YYXlFu2AcESdgQpEv/5Yx2uOCV/yh7YkZg==
+  dependencies:
+    "@intlify/devtools-types" "11.3.0"
+    "@intlify/message-compiler" "11.3.0"
+    "@intlify/shared" "11.3.0"
+
+"@intlify/devtools-types@11.3.0":
+  version "11.3.0"
+  resolved "https://registry.yarnpkg.com/@intlify/devtools-types/-/devtools-types-11.3.0.tgz#2670ac6a786ff56ac7b84f9af472771c7bc954fa"
+  integrity sha512-G9CNL4WpANWVdUjubOIIS7/D2j/0j+1KJmhBJxHilWNKr9mmt3IjFV3Hq4JoBP23uOoC5ynxz/FHZ42M+YxfGw==
+  dependencies:
+    "@intlify/core-base" "11.3.0"
+    "@intlify/shared" "11.3.0"
+
+"@intlify/message-compiler@11.3.0":
+  version "11.3.0"
+  resolved "https://registry.yarnpkg.com/@intlify/message-compiler/-/message-compiler-11.3.0.tgz#84c5d2af4a2119f836c5f6835b4b88e5d4076d4b"
+  integrity sha512-RAJp3TMsqohg/Wa7bVF3cChRhecSYBLrTCQSj7j0UtWVFLP+6iEJoE2zb7GU5fp+fmG5kCbUdzhmlAUCWXiUJw==
+  dependencies:
+    "@intlify/shared" "11.3.0"
+    source-map-js "^1.0.2"
+
+"@intlify/shared@11.3.0":
+  version "11.3.0"
+  resolved "https://registry.yarnpkg.com/@intlify/shared/-/shared-11.3.0.tgz#7abb22f05e502f3c6bf64dc771c448cdaa81d864"
+  integrity sha512-LC6P/uay7rXL5zZ5+5iRJfLs/iUN8apu9tm8YqQVmW3Uq3X4A0dOFUIDuAmB7gAC29wTHOS3EiN/IosNSz0eNQ==
+
 "@isaacs/cliui@^8.0.2":
   version "8.0.2"
   resolved "https://registry.npmjs.org/@isaacs/cliui/-/cliui-8.0.2.tgz"
@@ -9726,6 +9756,16 @@ vue-eslint-parser@^9.4.2:
     lodash "^4.17.21"
     semver "^7.3.6"
 
+vue-i18n@11.3.0:
+  version "11.3.0"
+  resolved "https://registry.yarnpkg.com/vue-i18n/-/vue-i18n-11.3.0.tgz#acb92847017f90b0fd96541cb3b08fdef50dc49c"
+  integrity sha512-1J+xDfDJTLhDxElkd3+XUhT7FYSZd2b8pa7IRKGxhWH/8yt6PTvi3xmWhGwhYT5EaXdatui11pF2R6tL73/zPA==
+  dependencies:
+    "@intlify/core-base" "11.3.0"
+    "@intlify/devtools-types" "11.3.0"
+    "@intlify/shared" "11.3.0"
+    "@vue/devtools-api" "^6.5.0"
+
 vue-router@^4.2.4:
   version "4.3.0"
   resolved "https://registry.npmjs.org/vue-router/-/vue-router-4.3.0.tgz"