diff --git a/src/wp-admin/js/updates.js b/src/wp-admin/js/updates.js
index 028a852eae..1ae4486e69 100644
--- a/src/wp-admin/js/updates.js
+++ b/src/wp-admin/js/updates.js
@@ -371,11 +371,11 @@
 		if ( 'plugins' === pagenow || 'plugins-network' === pagenow ) {
 			$updateRow = $( 'tr[data-plugin="' + args.plugin + '"]' );
 			$message   = $updateRow.find( '.update-message' ).removeClass( 'notice-error' ).addClass( 'updating-message notice-warning' ).find( 'p' );
-			message    = wp.updates.l10n.updatingLabel.replace( '%s', $updateRow.find( '.plugin-title strong' ).text() );
+			message    = wp.updates.l10n.pluginUpdatingLabel.replace( '%s', $updateRow.find( '.plugin-title strong' ).text() );
 		} else if ( 'plugin-install' === pagenow || 'plugin-install-network' === pagenow ) {
 			$card    = $( '.plugin-card-' + args.slug );
 			$message = $card.find( '.update-now' ).addClass( 'updating-message' );
-			message  = wp.updates.l10n.updatingLabel.replace( '%s', $message.data( 'name' ) );
+			message  = wp.updates.l10n.pluginUpdatingLabel.replace( '%s', $message.data( 'name' ) );
 
 			// Remove previous error messages, if any.
 			$card.removeClass( 'plugin-card-update-failed' ).find( '.notice.notice-error' ).remove();
@@ -429,8 +429,8 @@
 		}
 
 		$updateMessage
-			.attr( 'aria-label', wp.updates.l10n.updatedLabel.replace( '%s', response.pluginName ) )
-			.text( wp.updates.l10n.updated );
+			.attr( 'aria-label', wp.updates.l10n.pluginUpdatedLabel.replace( '%s', response.pluginName ) )
+			.text( wp.updates.l10n.pluginUpdated );
 
 		wp.a11y.speak( wp.updates.l10n.updatedMsg, 'polite' );
 
@@ -476,7 +476,7 @@
 
 			if ( response.pluginName ) {
 				$message.find( 'p' )
-					.attr( 'aria-label', wp.updates.l10n.updateFailedLabel.replace( '%s', response.pluginName ) );
+					.attr( 'aria-label', wp.updates.l10n.pluginUpdateFailedLabel.replace( '%s', response.pluginName ) );
 			} else {
 				$message.find( 'p' ).removeAttr( 'aria-label' );
 			}
@@ -493,7 +493,7 @@
 
 			if ( response.pluginName ) {
 				$card.find( '.update-now' )
-					.attr( 'aria-label', wp.updates.l10n.updateFailedLabel.replace( '%s', response.pluginName ) );
+					.attr( 'aria-label', wp.updates.l10n.pluginUpdateFailedLabel.replace( '%s', response.pluginName ) );
 			} else {
 				$card.find( '.update-now' ).removeAttr( 'aria-label' );
 			}
@@ -580,7 +580,7 @@
 			.removeClass( 'updating-message' )
 			.addClass( 'updated-message installed button-disabled' )
 			.attr( 'aria-label', wp.updates.l10n.pluginInstalledLabel.replace( '%s', response.pluginName ) )
-			.text( wp.updates.l10n.installed );
+			.text( wp.updates.l10n.pluginInstalled );
 
 		wp.a11y.speak( wp.updates.l10n.installedMsg, 'polite' );
 
@@ -965,7 +965,7 @@
 			$theme         = $( '[data-slug="' + response.slug + '"]' ),
 			updatedMessage = {
 				className: 'updated-message notice-success notice-alt',
-				message:   wp.updates.l10n.updated
+				message:   wp.updates.l10n.themeUpdated
 			},
 			$notice, newText;
 
@@ -1102,7 +1102,7 @@
 			.removeClass( 'updating-message' )
 			.addClass( 'updated-message disabled' )
 			.attr( 'aria-label', wp.updates.l10n.themeInstalledLabel.replace( '%s', response.themeName ) )
-			.text( wp.updates.l10n.installed );
+			.text( wp.updates.l10n.themeInstalled );
 
 		wp.a11y.speak( wp.updates.l10n.installedMsg, 'polite' );
 
@@ -1776,9 +1776,9 @@
 
 				if ( 'plugin-install' === pagenow || 'plugin-install-network' === pagenow ) {
 					if ( 'update-plugin' === job.action ) {
-						$message.attr( 'aria-label', wp.updates.l10n.updateNowLabel.replace( '%s', $message.data( 'name' ) ) );
+						$message.attr( 'aria-label', wp.updates.l10n.pluginUpdateNowLabel.replace( '%s', $message.data( 'name' ) ) );
 					} else if ( 'install-plugin' === job.action ) {
-						$message.attr( 'aria-label', wp.updates.l10n.installNowLabel.replace( '%s', $message.data( 'name' ) ) );
+						$message.attr( 'aria-label', wp.updates.l10n.pluginInstallNowLabel.replace( '%s', $message.data( 'name' ) ) );
 					}
 				}
 			}
diff --git a/src/wp-includes/script-loader.php b/src/wp-includes/script-loader.php
index 81c1cb8f5b..4fa8047bf0 100644
--- a/src/wp-includes/script-loader.php
+++ b/src/wp-includes/script-loader.php
@@ -637,20 +637,21 @@ function wp_default_scripts( &$scripts ) {
 				'noPlugins'                  => __( 'You do not appear to have any plugins available at this time.' ),
 				'noItemsSelected'            => __( 'Please select at least one item to perform this action on.' ),
 				'updating'                   => __( 'Updating...' ), // No ellipsis.
-				'updated'                    => __( 'Updated!' ),
+				'pluginUpdated'              => _x( 'Updated!', 'plugin' ),
+				'themeUpdated'               => _x( 'Updated!', 'theme' ),
 				'update'                     => __( 'Update' ),
 				'updateNow'                  => __( 'Update Now' ),
 				/* translators: %s: Plugin name and version */
-				'updateNowLabel'             => __( 'Update %s now' ),
+				'pluginUpdateNowLabel'       => _x( 'Update %s now', 'plugin' ),
 				'updateFailedShort'          => __( 'Update Failed!' ),
 				/* translators: %s: Error string for a failed update */
 				'updateFailed'               => __( 'Update Failed: %s' ),
 				/* translators: %s: Plugin name and version */
-				'updatingLabel'              => __( 'Updating %s...' ), // No ellipsis.
+				'pluginUpdatingLabel'        => _x( 'Updating %s...', 'plugin' ), // No ellipsis.
 				/* translators: %s: Plugin name and version */
-				'updatedLabel'               => __( '%s updated!' ),
+				'pluginUpdatedLabel'         => _x( '%s updated!', 'plugin' ),
 				/* translators: %s: Plugin name and version */
-				'updateFailedLabel'          => __( '%s update failed' ),
+				'pluginUpdateFailedLabel'    => _x( '%s update failed', 'plugin' ),
 				/* translators: Accessibility text */
 				'updatingMsg'                => __( 'Updating... please wait.' ), // No ellipsis.
 				/* translators: Accessibility text */
@@ -660,9 +661,10 @@ function wp_default_scripts( &$scripts ) {
 				'beforeunload'               => __( 'Updates may not complete if you navigate away from this page.' ),
 				'installNow'                 => __( 'Install Now' ),
 				/* translators: %s: Plugin name */
-				'installNowLabel'            => __( 'Install %s now' ),
+				'pluginInstallNowLabel'      => _x( 'Install %s now', 'plugin' ),
 				'installing'                 => __( 'Installing...' ),
-				'installed'                  => __( 'Installed!' ),
+				'pluginInstalled'            => _x( 'Installed!', 'plugin' ),
+				'themeInstalled'             => _x( 'Installed!', 'theme' ),
 				'installFailedShort'         => __( 'Install Failed!' ),
 				/* translators: %s: Error string for a failed installation */
 				'installFailed'              => __( 'Installation failed: %s' ),
diff --git a/tests/qunit/fixtures/updates.js b/tests/qunit/fixtures/updates.js
index 1d318d89b6..9e137c4e72 100644
--- a/tests/qunit/fixtures/updates.js
+++ b/tests/qunit/fixtures/updates.js
@@ -6,23 +6,25 @@ window._wpUpdatesSettings = {
 		'noPlugins': 'You do not appear to have any plugins available at this time.',
 		'noItemsSelected': 'Please select at least one item to perform this action on.',
 		'updating': 'Updating...',
-		'updated': 'Updated!',
+		'pluginUpdated': 'Updated!',
+		'themeUpdated': 'Updated!',
 		'update': 'Update',
 		'updateNow': 'Update Now',
-		'updateNowLabel': 'Update %s now',
+		'pluginUpdateNowLabel': 'Update %s now',
 		'updateFailedShort': 'Update Failed!',
 		'updateFailed': 'Update Failed: %s',
-		'updatingLabel': 'Updating %s...',
-		'updatedLabel': '%s updated!',
-		'updateFailedLabel': '%s update failed',
+		'pluginUpdatingLabel': 'Updating %s...',
+		'pluginUpdatedLabel': '%s updated!',
+		'pluginUpdateFailedLabel': '%s update failed',
 		'updatingMsg': 'Updating... please wait.',
 		'updatedMsg': 'Update completed successfully.',
 		'updateCancel': 'Update canceled.',
 		'beforeunload': 'Updates may not complete if you navigate away from this page.',
 		'installNow': 'Install Now',
-		'installNowLabel': 'Install %s now',
+		'pluginInstallNowLabel': 'Install %s now',
 		'installing': 'Installing...',
-		'installed': 'Installed!',
+		'pluginInstalled': 'Installed!',
+		'themeInstalled': 'Installed!',
 		'installFailedShort': 'Install Failed!',
 		'installFailed': 'Installation failed: %s',
 		'pluginInstallingLabel': 'Installing %s...', // No ellipsis