diff --git a/locales/en.yml b/locales/en.yml
index cbf64b2be..ba6adfbca 100644
--- a/locales/en.yml
+++ b/locales/en.yml
@@ -287,6 +287,7 @@ common/views/components/signin.vue:
   signin: "Sign in"
   or: "Or"
   signin-with-twitter: "Log in with Twitter"
+  login-failed: "Log in failed. Make sure you have entered your correct username and password."
 common/views/components/signup.vue:
   username: "Username"
   checking: "Confirming..."
diff --git a/locales/ja.yml b/locales/ja.yml
index 888fb08c9..310a73a64 100644
--- a/locales/ja.yml
+++ b/locales/ja.yml
@@ -314,6 +314,7 @@ common/views/components/signin.vue:
   signin: "サインイン"
   or: "または"
   signin-with-twitter: "Twitterでログイン"
+  login-failed: "ログインできませんでした。ユーザー名とパスワードを確認してください。"
 
 common/views/components/signup.vue:
   username: "ユーザー名"
diff --git a/src/client/app/common/views/components/signin.vue b/src/client/app/common/views/components/signin.vue
index cdfc75971..0c3cceb1b 100644
--- a/src/client/app/common/views/components/signin.vue
+++ b/src/client/app/common/views/components/signin.vue
@@ -60,7 +60,7 @@ export default Vue.extend({
 			}).then(() => {
 				location.reload();
 			}).catch(() => {
-				alert('something happened');
+				alert('%i18n:@login-failed%');
 				this.signing = false;
 			});
 		}