diff --git a/apps/updatenotification/lib/Controller/APIController.php b/apps/updatenotification/lib/Controller/APIController.php
index e2c720cdc09f9..f7f6e904e4be2 100644
--- a/apps/updatenotification/lib/Controller/APIController.php
+++ b/apps/updatenotification/lib/Controller/APIController.php
@@ -35,6 +35,8 @@
 use OCP\AppFramework\OCSController;
 use OCP\IConfig;
 use OCP\IRequest;
+use OCP\IUserSession;
+use OCP\L10N\IFactory;
 
 class APIController extends OCSController {
 
@@ -47,23 +49,29 @@ class APIController extends OCSController {
 	/** @var AppFetcher */
 	protected $appFetcher;
 
-	/**
-	 * @param string $appName
-	 * @param IRequest $request
-	 * @param IConfig $config
-	 * @param IAppManager $appManager
-	 * @param AppFetcher $appFetcher
-	 */
-	public function __construct($appName,
+	/** @var IFactory */
+	protected $l10nFactory;
+
+	/** @var IUserSession */
+	protected $userSession;
+
+	/** @var string */
+	protected $language;
+
+	public function __construct(string $appName,
 								IRequest $request,
 								IConfig $config,
 								IAppManager $appManager,
-								AppFetcher $appFetcher) {
+								AppFetcher $appFetcher,
+								IFactory $l10nFactory,
+								IUserSession $userSession) {
 		parent::__construct($appName, $request);
 
 		$this->config = $config;
 		$this->appManager = $appManager;
 		$this->appFetcher = $appFetcher;
+		$this->l10nFactory = $l10nFactory;
+		$this->userSession = $userSession;
 	}
 
 	/**
@@ -98,7 +106,7 @@ public function getAppList(string $newVersion): DataResponse {
 		$this->appFetcher->setVersion($newVersion, 'future-apps.json', false);
 
 		// Apps available on the app store for that version
-		$availableApps = array_map(function (array $app) {
+		$availableApps = array_map(static function (array $app) {
 			return $app['id'];
 		}, $this->appFetcher->get());
 
@@ -109,6 +117,8 @@ public function getAppList(string $newVersion): DataResponse {
 			], Http::STATUS_NOT_FOUND);
 		}
 
+		$this->language = $this->l10nFactory->getUserLanguage($this->userSession->getUser());
+
 		$missing = array_diff($installedApps, $availableApps);
 		$missing = array_map([$this, 'getAppDetails'], $missing);
 		sort($missing);
@@ -129,8 +139,8 @@ public function getAppList(string $newVersion): DataResponse {
 	 * @param string $appId
 	 * @return string[]
 	 */
-	protected function getAppDetails($appId): array {
-		$app = $this->appManager->getAppInfo($appId);
+	protected function getAppDetails(string $appId): array {
+		$app = $this->appManager->getAppInfo($appId, false, $this->language);
 		return [
 			'appId' => $appId,
 			'appName' => $app['name'] ?? $appId,
diff --git a/apps/updatenotification/lib/Notification/Notifier.php b/apps/updatenotification/lib/Notification/Notifier.php
index c7963a04ea6a0..b10629950ff0c 100644
--- a/apps/updatenotification/lib/Notification/Notifier.php
+++ b/apps/updatenotification/lib/Notification/Notifier.php
@@ -135,7 +135,7 @@ public function prepare(INotification $notification, string $languageCode): INot
 				$notification->setLink($this->url->linkToRouteAbsolute('settings.AdminSettings.index', ['section' => 'overview']) . '#version');
 			}
 		} else {
-			$appInfo = $this->getAppInfo($notification->getObjectType());
+			$appInfo = $this->getAppInfo($notification->getObjectType(), $languageCode);
 			$appName = ($appInfo === null) ? $notification->getObjectType() : $appInfo['name'];
 
 			if (isset($this->appVersions[$notification->getObjectType()])) {
@@ -195,7 +195,7 @@ protected function getAppVersions(): array {
 		return \OC_App::getAppVersions();
 	}
 
-	protected function getAppInfo($appId) {
-		return \OC_App::getAppInfo($appId);
+	protected function getAppInfo($appId, $languageCode) {
+		return \OC_App::getAppInfo($appId, false, $languageCode);
 	}
 }
diff --git a/lib/private/Installer.php b/lib/private/Installer.php
index 7b9706f65af95..65740c32c5795 100644
--- a/lib/private/Installer.php
+++ b/lib/private/Installer.php
@@ -114,9 +114,8 @@ public function installApp(string $appId, bool $forceEnable = false): string {
 		}
 
 		$basedir = $app['path'].'/'.$appId;
-		$info = OC_App::getAppInfo($basedir.'/appinfo/info.xml', true);
-
 		$l = \OC::$server->getL10N('core');
+		$info = OC_App::getAppInfo($basedir.'/appinfo/info.xml', true, $l->getLanguageCode());
 
 		if (!is_array($info)) {
 			throw new \Exception(
@@ -171,8 +170,7 @@ public function installApp(string $appId, bool $forceEnable = false): string {
 		//run appinfo/install.php
 		self::includeAppScript($basedir . '/appinfo/install.php');
 
-		$appData = OC_App::getAppInfo($appId);
-		OC_App::executeRepairSteps($appId, $appData['repair-steps']['install']);
+		OC_App::executeRepairSteps($appId, $info['repair-steps']['install']);
 
 		//set the installed version
 		\OC::$server->getConfig()->setAppValue($info['id'], 'installed_version', OC_App::getAppVersion($info['id'], false));
diff --git a/lib/private/legacy/OC_App.php b/lib/private/legacy/OC_App.php
index 6fecddba54017..a02ad2aebc9f4 100644
--- a/lib/private/legacy/OC_App.php
+++ b/lib/private/legacy/OC_App.php
@@ -980,13 +980,14 @@ public static function updateApp(string $appId): bool {
 		}
 
 		\OC::$server->getAppManager()->clearAppsCache();
-		$appData = self::getAppInfo($appId);
+		$l = \OC::$server->getL10N('core');
+		$appData = self::getAppInfo($appId, false, $l->getLanguageCode());
 
 		$ignoreMaxApps = \OC::$server->getConfig()->getSystemValue('app_install_overwrite', []);
 		$ignoreMax = in_array($appId, $ignoreMaxApps, true);
 		\OC_App::checkAppDependencies(
 			\OC::$server->getConfig(),
-			\OC::$server->getL10N('core'),
+			$l,
 			$appData,
 			$ignoreMax
 		);