diff --git a/src/wp-admin/includes/class-wp-automatic-updater.php b/src/wp-admin/includes/class-wp-automatic-updater.php
index c1c67206a9..e3fc5eb784 100644
--- a/src/wp-admin/includes/class-wp-automatic-updater.php
+++ b/src/wp-admin/includes/class-wp-automatic-updater.php
@@ -904,11 +904,11 @@ Thanks! -- The WordPress Team"
 			);
 			$body[] = '';
 
-			/* translators: %s: site title */
-			$subject = sprintf( __( '[%s] There were failures during background updates' ), $site_title );
+			/* translators: Background update failed notification email subject. %s: site title */
+			$subject = sprintf( __( '[%s] Background Update Failed' ), $site_title );
 		} else {
-			/* translators: %s: site title */
-			$subject = sprintf( __( '[%s] Background updates have finished' ), $site_title );
+			/* translators: Background update finished notification email subject. %s: site title */
+			$subject = sprintf( __( '[%s] Background Update Finished' ), $site_title );
 		}
 
 		$body[] = trim(
diff --git a/src/wp-admin/user-new.php b/src/wp-admin/user-new.php
index dfcf826552..a2403417ac 100644
--- a/src/wp-admin/user-new.php
+++ b/src/wp-admin/user-new.php
@@ -122,7 +122,7 @@ You\'ve been invited to join \'%1$s\' at
 Please click the following link to confirm the invite:
 %4$s'
 			);
-			wp_mail( $new_user_email, sprintf( __( '[%s] Joining confirmation' ), wp_specialchars_decode( get_option( 'blogname' ) ) ), sprintf( $message, get_option( 'blogname' ), home_url(), wp_specialchars_decode( translate_user_role( $role['name'] ) ), home_url( "/newbloguser/$newuser_key/" ) ) );
+			wp_mail( $new_user_email, sprintf( __( '[%s] Joining Confirmation' ), wp_specialchars_decode( get_option( 'blogname' ) ) ), sprintf( $message, get_option( 'blogname' ), home_url(), wp_specialchars_decode( translate_user_role( $role['name'] ) ), home_url( "/newbloguser/$newuser_key/" ) ) );
 
 			if ( $switched_locale ) {
 				restore_previous_locale();
diff --git a/src/wp-includes/functions.php b/src/wp-includes/functions.php
index f8d2a66216..6a30a598c3 100644
--- a/src/wp-includes/functions.php
+++ b/src/wp-includes/functions.php
@@ -6582,7 +6582,7 @@ All at ###SITENAME###
 	$email_change_email = array(
 		'to'      => $old_email,
 		/* translators: Site admin email change notification email subject. %s: Site title */
-		'subject' => __( '[%s] Notice of Admin Email Change' ),
+		'subject' => __( '[%s] Admin Email Changed' ),
 		'message' => $email_change_text,
 		'headers' => '',
 	);
diff --git a/src/wp-includes/ms-functions.php b/src/wp-includes/ms-functions.php
index 1e661dde24..d27f71954c 100644
--- a/src/wp-includes/ms-functions.php
+++ b/src/wp-includes/ms-functions.php
@@ -2645,7 +2645,7 @@ All at ###SITENAME###
 	$content      = str_replace( '###SITENAME###', wp_specialchars_decode( get_site_option( 'site_name' ), ENT_QUOTES ), $content );
 	$content      = str_replace( '###SITEURL###', network_home_url(), $content );
 
-	wp_mail( $value, sprintf( __( '[%s] New Network Admin Email Address' ), wp_specialchars_decode( get_site_option( 'site_name' ), ENT_QUOTES ) ), $content );
+	wp_mail( $value, sprintf( __( '[%s] Network Admin Email Change Request' ), wp_specialchars_decode( get_site_option( 'site_name' ), ENT_QUOTES ) ), $content );
 
 	if ( $switched_locale ) {
 		restore_previous_locale();
@@ -2704,7 +2704,7 @@ All at ###SITENAME###
 	$email_change_email = array(
 		'to'      => $old_email,
 		/* translators: Network admin email change notification email subject. %s: Network title */
-		'subject' => __( '[%s] Notice of Network Admin Email Change' ),
+		'subject' => __( '[%s] Network Admin Email Changed' ),
 		'message' => $email_change_text,
 		'headers' => '',
 	);
diff --git a/src/wp-includes/pluggable.php b/src/wp-includes/pluggable.php
index c0fc26140f..203296c648 100644
--- a/src/wp-includes/pluggable.php
+++ b/src/wp-includes/pluggable.php
@@ -1918,7 +1918,7 @@ if ( ! function_exists( 'wp_new_user_notification' ) ) :
 
 			$wp_new_user_notification_email_admin = array(
 				'to'      => get_option( 'admin_email' ),
-				/* translators: Password change notification email subject. %s: Site title */
+				/* translators: New user registration notification email subject. %s: Site title */
 				'subject' => __( '[%s] New User Registration' ),
 				'message' => $message,
 				'headers' => '',
@@ -1984,8 +1984,8 @@ if ( ! function_exists( 'wp_new_user_notification' ) ) :
 
 		$wp_new_user_notification_email = array(
 			'to'      => $user->user_email,
-			/* translators: Password change notification email subject. %s: Site title */
-			'subject' => __( '[%s] Your username and password info' ),
+			/* translators: Login credentials notification email subject. %s: Site title */
+			'subject' => __( '[%s] Login Credentials' ),
 			'message' => $message,
 			'headers' => '',
 		);
diff --git a/src/wp-includes/user.php b/src/wp-includes/user.php
index 6b7a974dbb..9696789dd5 100644
--- a/src/wp-includes/user.php
+++ b/src/wp-includes/user.php
@@ -1970,8 +1970,8 @@ All at ###SITENAME###
 
 			$pass_change_email = array(
 				'to'      => $user['user_email'],
-				/* translators: User password change notification email subject. %s: Site name */
-				'subject' => __( '[%s] Notice of Password Change' ),
+				/* translators: Password change notification email subject. %s: Site name */
+				'subject' => __( '[%s] Password Changed' ),
 				'message' => $pass_change_text,
 				'headers' => '',
 			);
@@ -2027,8 +2027,8 @@ All at ###SITENAME###
 
 			$email_change_email = array(
 				'to'      => $user['user_email'],
-				/* translators: User email change notification email subject. %s: Site name */
-				'subject' => __( '[%s] Notice of Email Change' ),
+				/* translators: Email change notification email subject. %s: Site name */
+				'subject' => __( '[%s] Email Changed' ),
 				'message' => $email_change_text,
 				'headers' => '',
 			);
@@ -2809,7 +2809,8 @@ All at ###SITENAME###
 		$content = str_replace( '###SITENAME###', $sitename, $content );
 		$content = str_replace( '###SITEURL###', home_url(), $content );
 
-		wp_mail( $_POST['email'], sprintf( __( '[%s] New Email Address' ), $sitename ), $content );
+		/* translators: New email address notification email subject. %s: Site name */
+		wp_mail( $_POST['email'], sprintf( __( '[%s] Email Change Request' ), $sitename ), $content );
 
 		$_POST['email'] = $current_user->user_email;
 	}
@@ -3168,7 +3169,7 @@ function _wp_privacy_send_erasure_fulfillment_notification( $request_id ) {
 	);
 
 	$subject = sprintf(
-		/* translators: %s: Site name. */
+		/* translators: Erasure request fulfilled notification email subject. %s: Site name. */
 		__( '[%s] Erasure Request Fulfilled' ),
 		$email_data['sitename']
 	);