diff --git a/wp-includes/class-wp-customize-manager.php b/wp-includes/class-wp-customize-manager.php
index 127d572be7..5b68a76943 100644
--- a/wp-includes/class-wp-customize-manager.php
+++ b/wp-includes/class-wp-customize-manager.php
@@ -1776,6 +1776,17 @@ final class WP_Customize_Manager {
 			}
 			$allowed_hosts[] = $host;
 		}
+
+		$switched_locale = switch_to_locale( get_user_locale() );
+		$l10n = array(
+			'shiftClickToEdit' => __( 'Shift-click to edit this element.' ),
+			'linkUnpreviewable' => __( 'This link is not live-previewable.' ),
+			'formUnpreviewable' => __( 'This form is not live-previewable.' ),
+		);
+		if ( $switched_locale ) {
+			restore_previous_locale();
+		}
+
 		$settings = array(
 			'changeset' => array(
 				'uuid' => $this->_changeset_uuid,
@@ -1800,11 +1811,7 @@ final class WP_Customize_Manager {
 			'activeControls' => array(),
 			'settingValidities' => $exported_setting_validities,
 			'nonce' => current_user_can( 'customize' ) ? $this->get_nonces() : array(),
-			'l10n' => array(
-				'shiftClickToEdit' => __( 'Shift-click to edit this element.' ),
-				'linkUnpreviewable' => __( 'This link is not live-previewable.' ),
-				'formUnpreviewable' => __( 'This form is not live-previewable.' ),
-			),
+			'l10n' => $l10n,
 			'_dirty' => array_keys( $post_values ),
 		);
 
diff --git a/wp-includes/class-wp-customize-widgets.php b/wp-includes/class-wp-customize-widgets.php
index 74031194fd..4be73e4d81 100644
--- a/wp-includes/class-wp-customize-widgets.php
+++ b/wp-includes/class-wp-customize-widgets.php
@@ -1123,15 +1123,21 @@ final class WP_Customize_Widgets {
 	public function export_preview_data() {
 		global $wp_registered_sidebars, $wp_registered_widgets;
 
+		$switched_locale = switch_to_locale( get_user_locale() );
+		$l10n = array(
+			'widgetTooltip'  => __( 'Shift-click to edit this widget.' ),
+		);
+		if ( $switched_locale ) {
+			restore_previous_locale();
+		}
+
 		// Prepare Customizer settings to pass to JavaScript.
 		$settings = array(
 			'renderedSidebars'   => array_fill_keys( array_unique( $this->rendered_sidebars ), true ),
 			'renderedWidgets'    => array_fill_keys( array_keys( $this->rendered_widgets ), true ),
 			'registeredSidebars' => array_values( $wp_registered_sidebars ),
 			'registeredWidgets'  => $wp_registered_widgets,
-			'l10n'               => array(
-				'widgetTooltip'  => __( 'Shift-click to edit this widget.' ),
-			),
+			'l10n'               => $l10n,
 			'selectiveRefreshableWidgets' => $this->get_selective_refreshable_widgets(),
 		);
 		foreach ( $settings['registeredWidgets'] as &$registered_widget ) {
diff --git a/wp-includes/customize/class-wp-customize-selective-refresh.php b/wp-includes/customize/class-wp-customize-selective-refresh.php
index 2342aef9ba..af0c74d67b 100644
--- a/wp-includes/customize/class-wp-customize-selective-refresh.php
+++ b/wp-includes/customize/class-wp-customize-selective-refresh.php
@@ -179,18 +179,24 @@ final class WP_Customize_Selective_Refresh {
 			}
 		}
 
+		$switched_locale = switch_to_locale( get_user_locale() );
+		$l10n = array(
+			'shiftClickToEdit' => __( 'Shift-click to edit this element.' ),
+			'clickEditMenu' => __( 'Click to edit this menu.' ),
+			'clickEditWidget' => __( 'Click to edit this widget.' ),
+			'clickEditTitle' => __( 'Click to edit the site title.' ),
+			'clickEditMisc' => __( 'Click to edit this element.' ),
+			/* translators: %s: document.write() */
+			'badDocumentWrite' => sprintf( __( '%s is forbidden' ), 'document.write()' ),
+		);
+		if ( $switched_locale ) {
+			restore_previous_locale();
+		}
+
 		$exports = array(
 			'partials'       => $partials,
 			'renderQueryVar' => self::RENDER_QUERY_VAR,
-			'l10n'           => array(
-				'shiftClickToEdit' => __( 'Shift-click to edit this element.' ),
-				'clickEditMenu' => __( 'Click to edit this menu.' ),
-				'clickEditWidget' => __( 'Click to edit this widget.' ),
-				'clickEditTitle' => __( 'Click to edit the site title.' ),
-				'clickEditMisc' => __( 'Click to edit this element.' ),
-				/* translators: %s: document.write() */
-				'badDocumentWrite' => sprintf( __( '%s is forbidden' ), 'document.write()' ),
-			),
+			'l10n'           => $l10n,
 		);
 
 		// Export data to JS.