diff --git a/plugins/woocommerce/changelog/51392-update-add-locale-param-to-jetpack-auth b/plugins/woocommerce/changelog/51392-update-add-locale-param-to-jetpack-auth
new file mode 100644
index 00000000000..8e1be059b7d
--- /dev/null
+++ b/plugins/woocommerce/changelog/51392-update-add-locale-param-to-jetpack-auth
@@ -0,0 +1,4 @@
+Significance: minor
+Type: add
+
+Add `locale` param when redirecting to the Jetpack auth page.
\ No newline at end of file
diff --git a/plugins/woocommerce/src/Admin/API/OnboardingPlugins.php b/plugins/woocommerce/src/Admin/API/OnboardingPlugins.php
index 55f55edfe85..e15c616ae9b 100644
--- a/plugins/woocommerce/src/Admin/API/OnboardingPlugins.php
+++ b/plugins/woocommerce/src/Admin/API/OnboardingPlugins.php
@@ -193,7 +193,7 @@ class OnboardingPlugins extends WC_REST_Data_Controller {
 
 		$actions = array_filter(
 			PluginsHelper::get_action_data( $actions ),
-			function( $action ) use ( $job_id ) {
+			function ( $action ) use ( $job_id ) {
 				return $action['job_id'] === $job_id;
 			}
 		);
@@ -237,7 +237,10 @@ class OnboardingPlugins extends WC_REST_Data_Controller {
 		}
 
 		$redirect_url = $request->get_param( 'redirect_url' );
-		$calypso_env  = defined( 'WOOCOMMERCE_CALYPSO_ENVIRONMENT' ) && in_array( WOOCOMMERCE_CALYPSO_ENVIRONMENT, [ 'development', 'wpcalypso', 'horizon', 'stage' ], true ) ? WOOCOMMERCE_CALYPSO_ENVIRONMENT : 'production';
+		$calypso_env  = defined( 'WOOCOMMERCE_CALYPSO_ENVIRONMENT' ) && in_array( WOOCOMMERCE_CALYPSO_ENVIRONMENT, array( 'development', 'wpcalypso', 'horizon', 'stage' ), true ) ? WOOCOMMERCE_CALYPSO_ENVIRONMENT : 'production';
+
+		$authorization_url = $manager->get_authorization_url( null, $redirect_url );
+		$authorization_url = add_query_arg( 'locale', $this->get_wpcom_locale(), $authorization_url );
 
 		if ( Features::is_enabled( 'use-wp-horizon' ) ) {
 			$calypso_env = 'horizon';
@@ -247,15 +250,53 @@ class OnboardingPlugins extends WC_REST_Data_Controller {
 			'success' => ! $errors->has_errors(),
 			'errors'  => $errors->get_error_messages(),
 			'url'     => add_query_arg(
-				[
+				array(
 					'from'        => $request->get_param( 'from' ),
 					'calypso_env' => $calypso_env,
-				],
-				$manager->get_authorization_url( null, $redirect_url )
+				),
+				$authorization_url,
 			),
 		];
 	}
 
+	/**
+	 * Return a locale string for wpcom.
+	 *
+	 * @return string
+	 */
+	private function get_wpcom_locale() {
+		// List of locales that should be used with region code.
+		$locale_to_lang = array(
+			'bre'   => 'br',
+			'de_AT' => 'de-at',
+			'de_CH' => 'de-ch',
+			'de'    => 'de_formal',
+			'el'    => 'el-po',
+			'en_GB' => 'en-gb',
+			'es_CL' => 'es-cl',
+			'es_MX' => 'es-mx',
+			'fr_BE' => 'fr-be',
+			'fr_CA' => 'fr-ca',
+			'nl_BE' => 'nl-be',
+			'nl'    => 'nl_formal',
+			'pt_BR' => 'pt-br',
+			'sr'    => 'sr_latin',
+			'zh_CN' => 'zh-cn',
+			'zh_HK' => 'zh-hk',
+			'zh_SG' => 'zh-sg',
+			'zh_TW' => 'zh-tw',
+		);
+
+		$system_locale = get_locale();
+		if ( isset( $locale_to_lang[ $system_locale ] ) ) {
+			// Return the locale with region code if it's in the list.
+			return $locale_to_lang[ $system_locale ];
+		}
+
+		// If the locale is not in the list, return the language code only.
+		return explode( '_', $system_locale )[0];
+	}
+
 	/**
 	 * Check whether the current user has permission to install plugins
 	 *
@@ -405,7 +446,7 @@ class OnboardingPlugins extends WC_REST_Data_Controller {
 				),
 				$slug
 			),
-			'type'				    => 'plugin_info_api_error',
+			'type'                  => 'plugin_info_api_error',
 			'slug'                  => $slug,
 			'api_version'           => $api->version,
 			'api_download_link'     => $api->download_link,