diff --git a/app/src/components/AuthForm.vue b/app/src/components/AuthForm.vue
index 1f658af..36a7eba 100644
--- a/app/src/components/AuthForm.vue
+++ b/app/src/components/AuthForm.vue
@@ -1,10 +1,13 @@
 <script setup lang="ts">
+import { useI18n } from 'vue-i18n'
 import { computed, onMounted, ref } from 'vue'
 import { RouterLink, useRouter } from 'vue-router'
 import { useToast } from 'vue-toastification'
 import api from '../utils/api'
 
+const { t } = useI18n()
 const emit = defineEmits(['onSubmit', 'onChange'])
+
 defineProps({
   type: {
     type: String,
@@ -124,7 +127,7 @@ const registerGuest = async () => {
             :icon="['fab', 'google']"
             class="text-text-secondary px-3 text-lg"
           />
-          <span class="font-medium"> 以 Google 繼續 </span>
+          <span class="font-medium"> {{ t('authform.google_login') }} </span>
         </a>
         <a
           id="GitHubLogin"
@@ -136,14 +139,14 @@ const registerGuest = async () => {
             :icon="['fab', 'github']"
             class="text-text-secondary px-3 text-lg"
           />
-          <span class="font-medium"> 以 GitHub 繼續 </span>
+          <span class="font-medium"> {{ t('authform.github_login') }} </span>
         </a>
         <p
           id="or"
           class="text-text-secondary flex justify-center mt-3"
           v-if="type === 'login' || type === 'register'"
         >
-          或
+          {{ t('authform.or') }}
         </p>
       </div>
       <div class="mb-6">
@@ -152,20 +155,22 @@ const registerGuest = async () => {
           id="username"
           ref="usernameInput"
           class="my-4 bg-bg-primary text-text-primary bg- rounded-md block w-full px-3 h-10 shadow-sm focus:outline-none placeholder:text-text-line focus:ring-2 focus:ring-text-primary ring-1 ring-bg-secondary"
-          :placeholder="type === 'login' ? '電子郵件 / 帳號名稱' : '帳號名稱'"
+          :placeholder="
+            t('authform.username') +
+            (type === 'login' ? ' / ' + t('authform.email') : '')
+          "
           v-model="username"
           required
           @input="handleChange()"
           autocomplete="username"
         />
-        <label
-          class="text-sm font-normal text-text-secondary"
+        <p
+          class="mx-1 text-xs font-normal text-text-secondary"
           id="NameRules"
-          v-if="type === 'username' || type === 'register'"
+          v-if="type === 'register'"
         >
-          <p>可用小寫字母、數字、"_"和"-"</p>
-          <p>小寫字母開頭，至多32字元</p>
-        </label>
+          {{ t('authform.username_rules') }}
+        </p>
       </div>
       <div class="mb-6" v-if="type === 'register'">
         <input
@@ -173,7 +178,7 @@ const registerGuest = async () => {
           id="email"
           ref="emailInput"
           class="my-4 bg-bg-primary text-text-primary bg- rounded-md block w-full px-3 h-10 shadow-sm focus:outline-none placeholder:text-text-line focus:ring-2 focus:ring-text-primary ring-1 ring-bg-secondary"
-          placeholder="電子郵件"
+          :placeholder="t('authform.email')"
           v-model="email"
           required
           @input="handleChange()"
@@ -185,11 +190,18 @@ const registerGuest = async () => {
           type="password"
           id="password"
           class="my-4 bg-bg-primary text-text-primary bg- rounded-md block w-full px-3 h-10 shadow-sm focus:outline-none placeholder:text-text-line focus:ring-2 focus:ring-text-primary ring-1 ring-bg-secondary"
-          placeholder="密碼"
+          :placeholder="t('authform.password')"
           v-model="password"
           required
           @input="handleChange()"
         />
+        <p
+          class="mx-1 text-xs font-normal text-text-secondary"
+          id="PasswordRules"
+          v-if="type === 'register'"
+        >
+          {{ t('authform.password_rules') }}
+        </p>
       </div>
       <p
         id="ErrorDisplay"
@@ -203,29 +215,29 @@ const registerGuest = async () => {
         class="inline-flex justify-center rounded-lg font-black py-2 bg-text-primary text-bg w-full"
         type="submit"
       >
-        <span v-if="type === 'login'"> 登入 </span>
-        <span v-else> 註冊 </span>
+        <span v-if="type === 'login'"> {{ t('authform.login') }} </span>
+        <span v-else> {{ t('authform.register') }} </span>
       </button>
 
       <p id="SwitchLoginRegister" class="text-text flex justify-center mt-3">
         <span id="CheckRegistered" v-if="type === 'register'">
-          已經有帳號了嗎？
+          {{ t('authform.already_registered') }}
           <RouterLink
             id="SwitchtoLogin"
             class="text-text-primary font-bold"
             to="/login"
           >
-            <u> 登入 </u>
+            <u> {{ t('authform.login') }} </u>
           </RouterLink></span
         >
         <span id="CheckRegistered" v-else-if="type === 'login'">
-          還沒有帳號嗎？
+          {{ t('authform.not_registered') }}
           <RouterLink
             id="SwitchtoRegister"
             class="text-text-primary font-bold"
             to="/register"
           >
-            <u> 註冊 </u>
+            <u> {{ t('authform.register') }} </u>
           </RouterLink></span
         >
       </p>
@@ -234,7 +246,7 @@ const registerGuest = async () => {
         class="rounded-lg py-2 mt-3 bg-bg-primary text-text-secondary w-full border-text-secondary border-2"
         @click="registerGuest()"
       >
-        以訪客身分繼續
+        {{ t('authform.continue_as_guest') }}
       </button>
     </form>
   </div>
diff --git a/app/src/i18n/locales/en.json b/app/src/i18n/locales/en.json
index d2ebd7f..7a6557a 100644
--- a/app/src/i18n/locales/en.json
+++ b/app/src/i18n/locales/en.json
@@ -40,5 +40,20 @@
     "feedback8": "\"I used to think programming was difficult, but now I find it interesting.\"",
     "feedback9": "\"I used to think programming was difficult and had nothing to do with my life. After this class, it feels much more approachable.\"",
     "contact_us": "Contact Us"
+  },
+  "authform": {
+    "google_login": "Continue with Google",
+    "github_login": "Continue with GitHub",
+    "or": "or",
+    "username": "Username",
+    "username_rules": "At most 32 characters, lowercase first, use lowercase letters, numbers, _, and -",
+    "email": "Email",
+    "password": "Password",
+    "login": "Login",
+    "register": "Register",
+    "already_registered": "Already have an account?",
+    "not_registered": "Don't have an account?",
+    "continue_as_guest": "Continue as Guest",
+    "password_rules": "At least 8 characters, including uppercase and lowercase letters and numbers"
   }
 }
diff --git a/app/src/i18n/locales/zh-TW.json b/app/src/i18n/locales/zh-TW.json
index 5141bf9..a7352ad 100644
--- a/app/src/i18n/locales/zh-TW.json
+++ b/app/src/i18n/locales/zh-TW.json
@@ -40,5 +40,20 @@
     "feedback8": "\"以前我覺得寫程式很難不過現在覺得很有趣\"",
     "feedback9": "\"以前覺得寫程式是我生活中碰不到而且很難的項目。但通過這堂課之後，覺得寫程式不再那麼難以親近\"",
     "contact_us": "聯絡我們"
+  },
+  "authform": {
+    "google_login": "以 Google 繼續",
+    "github_login": "以 GitHub 繼續",
+    "or": "或",
+    "username": "帳號名稱",
+    "username_rules": "至多 32 字元，小寫字母開頭，可用小寫字母、數字、_ 和 -",
+    "email": "電子郵件",
+    "password": "密碼",
+    "login": "登入",
+    "register": "註冊",
+    "already_registered": "已經有帳號了嗎？",
+    "not_registered": "還沒有帳號嗎？",
+    "continue_as_guest": "以訪客身分繼續",
+    "password_rules": "至少 8 個字元，包含數字及大小寫字母"
   }
 }