diff --git a/locales/en.yml b/locales/en.yml
index fbd95c5ab4..f9c326250a 100644
--- a/locales/en.yml
+++ b/locales/en.yml
@@ -248,6 +248,9 @@ desktop/views/components/drive.vue:
     upload: "Upload a file"
     url-upload: "Upload from a URL"
 
+desktop/views/components/messaging-window.vue:
+  title: "Messaging"
+
 desktop/views/components/notes.note.vue:
   reposted-by: "Reposted by {}"
   reply: "Reply"
diff --git a/locales/ja.yml b/locales/ja.yml
index 74416d01e2..40d2a6d219 100644
--- a/locales/ja.yml
+++ b/locales/ja.yml
@@ -248,6 +248,9 @@ desktop/views/components/drive.vue:
     upload: "ファイルをアップロード"
     url-upload: "URLからアップロード"
 
+desktop/views/components/messaging-window.vue:
+  title: "メッセージ"
+
 desktop/views/components/notes.note.vue:
   reposted-by: "{}がRenote"
   reply: "返信"
diff --git a/src/client/app/desktop/views/components/messaging-window.vue b/src/client/app/desktop/views/components/messaging-window.vue
index ac27465987..9580c5061d 100644
--- a/src/client/app/desktop/views/components/messaging-window.vue
+++ b/src/client/app/desktop/views/components/messaging-window.vue
@@ -1,6 +1,6 @@
 <template>
 <mk-window ref="window" width="500px" height="560px" @closed="$destroy">
-	<span slot="header" :class="$style.header">%fa:comments%メッセージ</span>
+	<span slot="header" :class="$style.header">%fa:comments%%i18n:@title%</span>
 	<mk-messaging :class="$style.content" @navigate="navigate"/>
 </mk-window>
 </template>