diff --git a/packages/backend/src/services/add-note-to-antenna.ts b/packages/backend/src/services/add-note-to-antenna.ts
index b5bcd2304..d502be254 100644
--- a/packages/backend/src/services/add-note-to-antenna.ts
+++ b/packages/backend/src/services/add-note-to-antenna.ts
@@ -7,7 +7,7 @@ import { publishAntennaStream, publishMainStream } from '@/services/stream.js';
 import { User } from '@/models/entities/user.js';
 
 export async function addNoteToAntenna(antenna: Antenna, note: Note, noteUser: { id: User['id']; }): Promise<void> {
-	// 通知しない設定になっているか、自分自身の投稿なら既読にする
+	// If it's set to not notify the user, or if it's the user's own post, read it.
 	const read = !antenna.notify || (antenna.userId === noteUser.id);
 
 	AntennaNotes.insert({
@@ -43,7 +43,7 @@ export async function addNoteToAntenna(antenna: Antenna, note: Note, noteUser: {
 			return;
 		}
 
-		// 2秒経っても既読にならなかったら通知
+		// Notify if not read after 2 seconds
 		setTimeout(async () => {
 			const unread = await AntennaNotes.findOneBy({ antennaId: antenna.id, read: false });
 			if (unread) {
diff --git a/packages/backend/src/services/create-notification.ts b/packages/backend/src/services/create-notification.ts
index ab4fbfa10..bbb4ab356 100644
--- a/packages/backend/src/services/create-notification.ts
+++ b/packages/backend/src/services/create-notification.ts
@@ -24,7 +24,7 @@ export async function createNotification(
 		createdAt: new Date(),
 		notifieeId,
 		type,
-		// 相手がこの通知をミュートしているようなら、既読を予めつけておく
+		// If the other party seems to have muted this notification, pre-read it.
 		isRead: isMuted,
 		...data,
 	} as Partial<Notification>)
@@ -35,13 +35,13 @@ export async function createNotification(
 	// Publish notification event
 	publishMainStream(notifieeId, 'notification', packed);
 
-	// 2秒経っても(今回作成した)通知が既読にならなかったら「未読の通知がありますよ」イベントを発行する
+	// If the notification (created this time) has not been read after 2 seconds, issue a "You have unread notifications" event.
 	setTimeout(async () => {
 		const fresh = await Notifications.findOneBy({ id: notification.id });
-		if (fresh == null) return; // 既に削除されているかもしれない
+		if (fresh == null) return; // It may have already been deleted.
 		if (fresh.isRead) return;
 
-		//#region ただしミュートしているユーザーからの通知なら無視
+		//#region However, if the notification comes from a muted user, ignore it.
 		const mutings = await Mutings.findBy({
 			muterId: notifieeId,
 		});
diff --git a/packages/backend/src/services/delete-account.ts b/packages/backend/src/services/delete-account.ts
index c1ab9e2be..ed3e381c4 100644
--- a/packages/backend/src/services/delete-account.ts
+++ b/packages/backend/src/services/delete-account.ts
@@ -7,7 +7,7 @@ export async function deleteAccount(user: {
 	id: string;
 	host: string | null;
 }): Promise<void> {
-	// 物理削除する前にDelete activityを送信する
+	// Send Delete activity before physical deletion
 	await doPostSuspend(user).catch(() => {});
 
 	createDeleteAccountJob(user, {