diff --git a/src/i18n/locales/en.ts b/src/i18n/locales/en.ts
index c8f726a..4276f63 100644
--- a/src/i18n/locales/en.ts
+++ b/src/i18n/locales/en.ts
@@ -20,6 +20,7 @@ export default {
     quickAria: 'Registration portals',
     invalidMobile: 'Please enter a valid mobile number',
     invalidCaptcha: 'Please enter the 6-digit code',
+    invalidOrExpired: 'The verification code is invalid or has expired.',
     missingSlug: 'Missing competition address. Please use the official entry link.',
     competitionMissing: 'This competition is unavailable or unpublished.',
     competitionLoadFailed: 'Unable to load this competition. Please try again later.',
diff --git a/src/i18n/locales/zh-CN.ts b/src/i18n/locales/zh-CN.ts
index c9542ab..d79394d 100644
--- a/src/i18n/locales/zh-CN.ts
+++ b/src/i18n/locales/zh-CN.ts
@@ -20,6 +20,7 @@ export default {
     quickAria: '快捷入口',
     invalidMobile: '请先填写正确手机号',
     invalidCaptcha: '请输入 6 位验证码',
+    invalidOrExpired: '验证码无效或已过期',
     missingSlug: '缺少赛事访问地址，请从正确入口进入',
     competitionMissing: '赛事不存在或未发布，请核对访问地址',
     competitionLoadFailed: '暂时无法加载赛事信息，请稍后重试',
diff --git a/src/views/LoginView.vue b/src/views/LoginView.vue
index 53313b2..43c1f63 100644
--- a/src/views/LoginView.vue
+++ b/src/views/LoginView.vue
@@ -181,8 +181,19 @@ function onCaptchaInput(event: Event) {
   captchaFieldError.value = false
 }
 
+function localizePortalApiMessage(message: string): string {
+  if (!isEnglishLogin.value) return message
+  if (message === '验证码无效或已过期') return t('login.invalidOrExpired')
+  if (message === '赛事不存在或未发布' || message.startsWith('赛事不存在或未发布')) {
+    return t('login.competitionMissing')
+  }
+  const frequent = message.match(/请勿频繁发送，请\s*(\d+)\s*秒后再试/)
+  if (frequent) return t('login.tooFrequent', { n: frequent[1] })
+  return message
+}
+
 function parseJsonErrorPayload(data: unknown): string {
-  return userFacingApiMessage(data, t('login.requestFailed'))
+  return localizePortalApiMessage(userFacingApiMessage(data, t('login.requestFailed')))
 }
 
 let loginHtmlClassApplied = false
@@ -264,6 +275,7 @@ async function sendCode() {
         mobile: m,
         portal: isAudienceLogin.value ? 'audience' : 'participant',
         competition_slug: competitionSlug.value || undefined,
+        lang: portalLocale.value === 'en' ? 'en' : undefined,
       }),
     })
     const data: unknown = await r.json().catch(() => ({}))