diff --git a/core/ajax/update.php b/core/ajax/update.php
index 43ed75b07f1..d6af84e95b1 100644
--- a/core/ajax/update.php
+++ b/core/ajax/update.php
@@ -4,25 +4,26 @@ $RUNTIME_NOAPPS = true;
 require_once '../../lib/base.php';
 
 if (OC::checkUpgrade(false)) {
+	$l = new \OC_L10N('core');
 	$eventSource = new OC_EventSource();
 	$updater = new \OC\Updater(\OC_Log::$object);
-	$updater->listen('\OC\Updater', 'maintenanceStart', function () use ($eventSource) {
-		$eventSource->send('success', 'Turned on maintenance mode');
+	$updater->listen('\OC\Updater', 'maintenanceStart', function () use ($eventSource, $l) {
+		$eventSource->send('success', (string)$l->t('Turned on maintenance mode'));
 	});
-	$updater->listen('\OC\Updater', 'maintenanceEnd', function () use ($eventSource) {
-		$eventSource->send('success', 'Turned off maintenance mode');
+	$updater->listen('\OC\Updater', 'maintenanceEnd', function () use ($eventSource, $l) {
+		$eventSource->send('success', (string)$l->t('Turned off maintenance mode'));
 	});
-	$updater->listen('\OC\Updater', 'dbUpgrade', function () use ($eventSource) {
-		$eventSource->send('success', 'Updated database');
+	$updater->listen('\OC\Updater', 'dbUpgrade', function () use ($eventSource, $l) {
+		$eventSource->send('success', (string)$l->t('Updated database'));
 	});
-	$updater->listen('\OC\Updater', 'filecacheStart', function () use ($eventSource) {
-		$eventSource->send('success', 'Updating filecache, this may take really long...');
+	$updater->listen('\OC\Updater', 'filecacheStart', function () use ($eventSource, $l) {
+		$eventSource->send('success', (string)$l->t('Updating filecache, this may take really long...'));
 	});
-	$updater->listen('\OC\Updater', 'filecacheDone', function () use ($eventSource) {
-		$eventSource->send('success', 'Updated filecache');
+	$updater->listen('\OC\Updater', 'filecacheDone', function () use ($eventSource, $l) {
+		$eventSource->send('success', (string)$l->t('Updated filecache'));
 	});
-	$updater->listen('\OC\Updater', 'filecacheProgress', function ($out) use ($eventSource) {
-		$eventSource->send('success', '... ' . $out . '% done ...');
+	$updater->listen('\OC\Updater', 'filecacheProgress', function ($out) use ($eventSource, $l) {
+		$eventSource->send('success', (string)$l->t('... %d%% done ...', array('percent' => $out)));
 	});
 	$updater->listen('\OC\Updater', 'failure', function ($message) use ($eventSource) {
 		$eventSource->send('failure', $message);