diff --git a/apps/admin_dependencies_chk/appinfo/app.php b/apps/admin_dependencies_chk/appinfo/app.php
index e2169b5dd77..f282b103c87 100644
--- a/apps/admin_dependencies_chk/appinfo/app.php
+++ b/apps/admin_dependencies_chk/appinfo/app.php
@@ -1,5 +1,5 @@
 <?php
-$l=new OC_L10N('admin_dependencies_chk');
+$l=OC_L10N::get('admin_dependencies_chk');
 
 OC_App::register( array( 
   'order' => 14,
diff --git a/apps/admin_dependencies_chk/settings.php b/apps/admin_dependencies_chk/settings.php
index ce90dd604ca..ea1ce9fb3dc 100644
--- a/apps/admin_dependencies_chk/settings.php
+++ b/apps/admin_dependencies_chk/settings.php
@@ -20,7 +20,7 @@
  * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
  *
  */
-$l=new OC_L10N('admin_dependencies_chk');
+$l=OC_L10N::get('admin_dependencies_chk');
 $tmpl = new OC_Template( 'admin_dependencies_chk', 'settings');
 
 $modules = array();
diff --git a/apps/bookmarks/bookmarksHelper.php b/apps/bookmarks/bookmarksHelper.php
index 7ada69014fb..f1464be79de 100644
--- a/apps/bookmarks/bookmarksHelper.php
+++ b/apps/bookmarks/bookmarksHelper.php
@@ -94,7 +94,7 @@ function addBookmark($url, $title, $tags='') {
 	}
 	
 	if(empty($title)) {
-		$l = new OC_L10N('bookmarks');
+		$l = OC_L10N::get('bookmarks');
 		$title = $l->t('unnamed');
 	}
 	
diff --git a/apps/bookmarks/templates/bookmarklet.php b/apps/bookmarks/templates/bookmarklet.php
index 5ea67f04df2..f7074462a79 100644
--- a/apps/bookmarks/templates/bookmarklet.php
+++ b/apps/bookmarks/templates/bookmarklet.php
@@ -1,7 +1,7 @@
 <?php
 
 function createBookmarklet() {
-	$l = new OC_L10N('bookmarks');
+	$l = OC_L10N::get('bookmarks');
 	echo '<small>' . $l->t('Drag this to your browser bookmarks and click it, when you want to bookmark a webpage quickly:') . '</small>'
 	. '<a class="bookmarklet" href="javascript:(function(){var a=window,b=document,c=encodeURIComponent,d=a.open(\'' . OC_Helper::linkToAbsolute('bookmarks', 'addBm.php') . '?output=popup&url=\'+c(b.location),\'bkmk_popup\',\'left=\'+((a.screenX||a.screenLeft)+10)+\',top=\'+((a.screenY||a.screenTop)+10)+\',height=230px,width=230px,resizable=1,alwaysRaised=1\');a.setTimeout(function(){d.focus()},300);})();">'
 	. $l->t('Read later') . '</a>';
diff --git a/apps/calendar/ajax/calendar/new.form.php b/apps/calendar/ajax/calendar/new.form.php
index 6e7423cbe92..fa014351f77 100644
--- a/apps/calendar/ajax/calendar/new.form.php
+++ b/apps/calendar/ajax/calendar/new.form.php
@@ -7,7 +7,6 @@
  */
 
 require_once('../../../../lib/base.php');
-$l10n = new OC_L10N('calendar');
 OC_JSON::checkLoggedIn();
 OC_JSON::checkAppEnabled('calendar');
 $calendarcolor_options = OC_Calendar_Calendar::getCalendarColorOptions();
diff --git a/apps/calendar/ajax/calendar/overview.php b/apps/calendar/ajax/calendar/overview.php
index 2f73f5d0710..dd55f3e018f 100644
--- a/apps/calendar/ajax/calendar/overview.php
+++ b/apps/calendar/ajax/calendar/overview.php
@@ -7,7 +7,7 @@
  */
 
 require_once('../../../../lib/base.php');
-$l10n = new OC_L10N('calendar');
+$l10n = OC_L10N::get('calendar');
 OC_JSON::checkLoggedIn();
 OC_JSON::checkAppEnabled('calendar');
 $output = new OC_TEMPLATE("calendar", "part.choosecalendar");
diff --git a/apps/calendar/ajax/event/delete.php b/apps/calendar/ajax/event/delete.php
index 862dec6bf5b..5fc12900ef3 100644
--- a/apps/calendar/ajax/event/delete.php
+++ b/apps/calendar/ajax/event/delete.php
@@ -7,8 +7,6 @@
  */
 require_once('../../../../lib/base.php');
 
-$l10n = new OC_L10N('calendar');
-
 OC_JSON::checkLoggedIn();
 OC_JSON::checkAppEnabled('calendar');
 
diff --git a/apps/calendar/ajax/event/new.php b/apps/calendar/ajax/event/new.php
index 59fda79da73..7070bbf05d7 100644
--- a/apps/calendar/ajax/event/new.php
+++ b/apps/calendar/ajax/event/new.php
@@ -8,8 +8,6 @@
 
 require_once('../../../../lib/base.php');
 
-$l10n = new OC_L10N('calendar');
-
 OC_JSON::checkLoggedIn();
 OC_JSON::checkAppEnabled('calendar');
 
diff --git a/apps/calendar/ajax/events.php b/apps/calendar/ajax/events.php
index c62f93c540e..d053df2e4c1 100755
--- a/apps/calendar/ajax/events.php
+++ b/apps/calendar/ajax/events.php
@@ -8,7 +8,7 @@
 
 require_once ('../../../lib/base.php');
 require_once('when/When.php');
-$l = new OC_L10N('calendar');
+$l = OC_L10N::get('calendar');
 $unnamed = $l->t('unnamed');
 function create_return_event($event, $vevent){
 	$return_event = array();
diff --git a/apps/calendar/ajax/import/dialog.php b/apps/calendar/ajax/import/dialog.php
index 2e002092150..16ec54d14a2 100644
--- a/apps/calendar/ajax/import/dialog.php
+++ b/apps/calendar/ajax/import/dialog.php
@@ -9,7 +9,6 @@
 require_once('../../../../lib/base.php');
 OC_JSON::checkLoggedIn();
 OC_Util::checkAppEnabled('calendar');
-$l10n = new OC_L10N('calendar');
 $tmpl = new OC_Template('calendar', 'part.import');
 $tmpl->assign('path', $_POST['path']);
 $tmpl->assign('filename', $_POST['filename']);
diff --git a/apps/calendar/ajax/settings/guesstimezone.php b/apps/calendar/ajax/settings/guesstimezone.php
index d45a70e1ce3..c02b8d10b8d 100755
--- a/apps/calendar/ajax/settings/guesstimezone.php
+++ b/apps/calendar/ajax/settings/guesstimezone.php
@@ -10,7 +10,7 @@ require_once('../../../../lib/base.php');
 OC_JSON::checkLoggedIn();
 OC_JSON::checkAppEnabled('calendar');
 
-$l = new OC_L10N('calendar');
+$l = OC_L10N::get('calendar');
 
 $lat = $_GET['lat'];
 $lng = $_GET['long'];
diff --git a/apps/calendar/ajax/settings/settimezone.php b/apps/calendar/ajax/settings/settimezone.php
index c639753fe2f..8dda28335f7 100644
--- a/apps/calendar/ajax/settings/settimezone.php
+++ b/apps/calendar/ajax/settings/settimezone.php
@@ -9,7 +9,7 @@
 // Init owncloud
 require_once('../../../../lib/base.php');
 
-$l=new OC_L10N('calendar');
+$l=OC_L10N::get('calendar');
 
 // Check if we are a user
 OC_JSON::checkLoggedIn();
diff --git a/apps/calendar/appinfo/app.php b/apps/calendar/appinfo/app.php
index f297c4d16d4..1fece8077ac 100644
--- a/apps/calendar/appinfo/app.php
+++ b/apps/calendar/appinfo/app.php
@@ -1,5 +1,5 @@
 <?php
-$l=new OC_L10N('calendar');
+$l=OC_L10N::get('calendar');
 OC::$CLASSPATH['OC_Calendar_App'] = 'apps/calendar/lib/app.php';
 OC::$CLASSPATH['OC_Calendar_Calendar'] = 'apps/calendar/lib/calendar.php';
 OC::$CLASSPATH['OC_Calendar_Object'] = 'apps/calendar/lib/object.php';
diff --git a/apps/calendar/lib/app.php b/apps/calendar/lib/app.php
index 22c1133e006..4b481a4f286 100644
--- a/apps/calendar/lib/app.php
+++ b/apps/calendar/lib/app.php
@@ -9,7 +9,7 @@
 /**
  * This class manages our app actions
  */
-OC_Calendar_App::$l10n = new OC_L10N('calendar');
+OC_Calendar_App::$l10n = OC_L10N::get('calendar');
 class OC_Calendar_App{
 	public static $l10n;
 	protected static $categories = null;
diff --git a/apps/contacts/lib/app.php b/apps/contacts/lib/app.php
index 78fdfe6a10a..475d2c8dc2e 100644
--- a/apps/contacts/lib/app.php
+++ b/apps/contacts/lib/app.php
@@ -9,7 +9,7 @@
 /**
  * This class manages our app actions
  */
-OC_Contacts_App::$l10n = new OC_L10N('contacts');
+OC_Contacts_App::$l10n = OC_L10N::get('contacts');
 OC_Contacts_App::$categories = new OC_VCategories('contacts');
 class OC_Contacts_App {
 	public static $l10n;
diff --git a/apps/gallery/appinfo/app.php b/apps/gallery/appinfo/app.php
index 325c2acf249..b8e7c14fcaf 100644
--- a/apps/gallery/appinfo/app.php
+++ b/apps/gallery/appinfo/app.php
@@ -27,7 +27,7 @@ OC::$CLASSPATH['OC_Gallery_Scanner'] = 'apps/gallery/lib/scanner.php';
 OC::$CLASSPATH['OC_Gallery_Sharing'] = 'apps/gallery/lib/sharing.php';
 OC::$CLASSPATH['OC_Gallery_Hooks_Handlers'] = 'apps/gallery/lib/hooks_handlers.php';
 
-$l = new OC_L10N('gallery');
+$l = OC_L10N::get('gallery');
 
 OC_App::register(array(
   'order' => 20,
diff --git a/apps/gallery/templates/index.php b/apps/gallery/templates/index.php
index 9bec5db1b91..cf654b68c0b 100644
--- a/apps/gallery/templates/index.php
+++ b/apps/gallery/templates/index.php
@@ -7,7 +7,7 @@ OC_Util::addStyle('files', 'files');
 OC_Util::addScript('files_imageviewer', 'jquery.mousewheel-3.0.4.pack');
 OC_Util::addScript('files_imageviewer', 'jquery.fancybox-1.3.4.pack');
 OC_Util::addStyle( 'files_imageviewer', 'jquery.fancybox-1.3.4' );
-$l = new OC_L10N('gallery');
+$l = OC_L10N::get('gallery');
 ?>
 <script type="text/javascript">var gallery_scanning_root='<? echo OC_Preferences::getValue(OC_User::getUser(), 'gallery', 'root', '/'); ?>'; var gallery_default_order = '<? echo OC_Preferences::getValue(OC_User::getUser(), 'gallery', 'order', 'ASC'); ?>';</script>
 <div id="controls">
diff --git a/apps/gallery/templates/view_album.php b/apps/gallery/templates/view_album.php
index 6b513a672d5..f938e487954 100644
--- a/apps/gallery/templates/view_album.php
+++ b/apps/gallery/templates/view_album.php
@@ -5,7 +5,7 @@ OC_Util::addScript('gallery', 'album_cover');
 OC_Util::addScript('files_imageviewer', 'jquery.mousewheel-3.0.4.pack');
 OC_Util::addScript('files_imageviewer', 'jquery.fancybox-1.3.4.pack');
 OC_Util::addStyle( 'files_imageviewer', 'jquery.fancybox-1.3.4' );
-$l = new OC_L10N('gallery');
+$l = OC_L10N::get('gallery');
 ?>
 <script type="text/javascript">
   $(document).ready(function() {
diff --git a/apps/media/appinfo/app.php b/apps/media/appinfo/app.php
index 651067fbbe1..b0891874f7b 100644
--- a/apps/media/appinfo/app.php
+++ b/apps/media/appinfo/app.php
@@ -20,7 +20,7 @@
  *
  */
 
-$l=new OC_L10N('media');
+$l=OC_L10N::get('media');
 
 require_once('apps/media/lib_media.php');
 
diff --git a/core/ajax/translations.php b/core/ajax/translations.php
index 2e436f8d84e..a6433b1964a 100644
--- a/core/ajax/translations.php
+++ b/core/ajax/translations.php
@@ -26,7 +26,7 @@ require_once('../../lib/base.php');
 
 $app = $_POST["app"];
 
-$l = new OC_L10N( $app );
+$l = OC_L10N::get( $app );
 
 OC_JSON::success(array('data' => $l->getTranslations()));
 ?>
diff --git a/core/lostpassword/index.php b/core/lostpassword/index.php
index a9b7d10804f..89bb6cfa794 100644
--- a/core/lostpassword/index.php
+++ b/core/lostpassword/index.php
@@ -20,7 +20,7 @@ if (isset($_POST['user'])) {
 			$tmpl = new OC_Template('core/lostpassword', 'email');
 			$tmpl->assign('link', $link);
 			$msg = $tmpl->fetchPage();
-			$l = new OC_L10N('core');
+			$l = OC_L10N::get('core');
 			$from = 'lostpassword-noreply@' . $_SERVER['HTTP_HOST'];
 			mail($email, $l->t('Owncloud password reset'), $msg, 'From:' . $from);
 		}
diff --git a/core/strings.php b/core/strings.php
index 9b4290db476..8c3f64ef14f 100644
--- a/core/strings.php
+++ b/core/strings.php
@@ -1,7 +1,7 @@
 <?php
 
 //some strings that are used in /lib but wont be translatable unless they are in /core too
-$l=new OC_L10N('core');
+$l=OC_L10N::get('core');
 $l->t("Personal");
 $l->t("Users");
 $l->t("Apps");
diff --git a/files/ajax/upload.php b/files/ajax/upload.php
index f8b8f0e2e5f..af7a7acf702 100644
--- a/files/ajax/upload.php
+++ b/files/ajax/upload.php
@@ -14,7 +14,7 @@ if (!isset($_FILES['files'])) {
 }
 foreach ($_FILES['files']['error'] as $error) {
 	if ($error != 0) {
-		$l=new OC_L10N('files');
+		$l=OC_L10N::get('files');
 		$errors = array(
 			UPLOAD_ERR_OK=>$l->t("There is no error, the file uploaded with success"),
 			UPLOAD_ERR_INI_SIZE=>$l->t("The uploaded file exceeds the upload_max_filesize directive in php.ini").ini_get('upload_max_filesize'),
diff --git a/files/appinfo/app.php b/files/appinfo/app.php
index 0bf73d9a07e..1b495e52f40 100644
--- a/files/appinfo/app.php
+++ b/files/appinfo/app.php
@@ -1,7 +1,7 @@
 <?php
 
 
-$l=new OC_L10N('files');
+$l=OC_L10N::get('files');
 
 OC_App::register( array( "order" => 2, "id" => "files", "name" => "Files" ));
 
diff --git a/lib/app.php b/lib/app.php
index b499e1a8ef2..db2df7c2434 100755
--- a/lib/app.php
+++ b/lib/app.php
@@ -254,7 +254,7 @@ class OC_App{
 	 * entries are sorted by the key 'order' ascending.
 	 */
 	public static function getSettingsNavigation(){
-		$l=new OC_L10N('core');
+		$l=OC_L10N::get('core');
 
 		$settings = array();
 		// by default, settings only contain the help menu
diff --git a/lib/files.php b/lib/files.php
index 01558a68588..aacd2c9e004 100644
--- a/lib/files.php
+++ b/lib/files.php
@@ -225,7 +225,7 @@ class OC_Files {
 	*/
 	static function validateZipDownload($dir, $files) {
 		if(!OC_Config::getValue('allowZipDownload', true)) {
-			$l = new OC_L10N('files');
+			$l = OC_L10N::get('files');
 			header("HTTP/1.0 409 Conflict");
 			$tmpl = new OC_Template( '', 'error', 'user' );
 			$errors = array(
@@ -250,7 +250,7 @@ class OC_Files {
 				$totalsize += OC_Filesystem::filesize($dir.'/'.$files);
 			}
 			if($totalsize > $zipLimit) {
-				$l = new OC_L10N('files');
+				$l = OC_L10N::get('files');
 				header("HTTP/1.0 409 Conflict");
 				$tmpl = new OC_Template( '', 'error', 'user' );
 				$errors = array(
diff --git a/lib/json.php b/lib/json.php
index cedf79fd7c3..0d208ce12a2 100644
--- a/lib/json.php
+++ b/lib/json.php
@@ -24,7 +24,7 @@ class OC_JSON{
 	*/
 	public static function checkAppEnabled($app){
 		if( !OC_App::isEnabled($app)){
-			$l = new OC_L10N('core');
+			$l = OC_L10N::get('core');
 			self::error(array( 'data' => array( 'message' => $l->t('Application is not enabled') )));
 			exit();
 		}
@@ -35,7 +35,7 @@ class OC_JSON{
 	*/
 	public static function checkLoggedIn(){
 		if( !OC_User::isLoggedIn()){
-			$l = new OC_L10N('core');
+			$l = OC_L10N::get('core');
 			self::error(array( 'data' => array( 'message' => $l->t('Authentication error') )));
 			exit();
 		}
@@ -47,7 +47,7 @@ class OC_JSON{
 	public static function checkAdminUser(){
 		self::checkLoggedIn();
 		if( !OC_Group::inGroup( OC_User::getUser(), 'admin' )){
-			$l = new OC_L10N('core');
+			$l = OC_L10N::get('core');
 			self::error(array( 'data' => array( 'message' => $l->t('Authentication error') )));
 			exit();
 		}
diff --git a/lib/l10n.php b/lib/l10n.php
index 00bff08bf7f..c0ecdbd1b70 100644
--- a/lib/l10n.php
+++ b/lib/l10n.php
@@ -24,6 +24,11 @@
  * This class is for i18n and l10n
  */
 class OC_L10N{
+	/**
+	 * cached instances
+	 */
+	protected static $instances=array();
+	
 	/**
 	 * cache
 	 */
@@ -46,6 +51,21 @@ class OC_L10N{
 		'date' => 'd.m.Y',
 		'datetime' => 'd.m.Y H:i:s',
 		'time' => 'H:i:s');
+		
+	/**
+	 * get an L10N instance
+	 * @return OC_L10N
+	 */
+	public static function get($app,$lang=null){
+		if(is_null($lang)){
+			if(!isset(self::$instances[$app])){
+				self::$instances[$app]=new OC_L10N($app);
+			}
+			return self::$instances[$app];
+		}else{
+			return new OC_L10N($app,$lang);
+		}
+	}
 	
 	/**
 	 * @brief The constructor
diff --git a/lib/template.php b/lib/template.php
index 5bcf52b9321..cb39a10df31 100644
--- a/lib/template.php
+++ b/lib/template.php
@@ -76,7 +76,7 @@ function simple_file_size($bytes) {
 }
 
 function relative_modified_date($timestamp) {
-    $l=new OC_L10N('template');
+    $l=OC_L10N::get('template');
 	$timediff = time() - $timestamp;
 	$diffminutes = round($timediff/60);
 	$diffhours = round($diffminutes/60);
@@ -155,7 +155,7 @@ class OC_Template{
 		$this->renderas = $renderas;
 		$this->application = $app;
 		$this->vars = array();
-		$this->l10n = new OC_L10N($app);
+		$this->l10n = OC_L10N::get($app);
 
 		$this->findTemplate($name);
 	}
diff --git a/settings/ajax/lostpassword.php b/settings/ajax/lostpassword.php
index a2dfc033206..5874dec9647 100644
--- a/settings/ajax/lostpassword.php
+++ b/settings/ajax/lostpassword.php
@@ -5,7 +5,7 @@ require_once('../../lib/base.php');
 
 OC_JSON::checkLoggedIn();
 
-$l=new OC_L10N('core');
+$l=OC_L10N::get('core');
 
 // Get data
 if( isset( $_POST['email'] ) ){
diff --git a/settings/ajax/openid.php b/settings/ajax/openid.php
index c4b119b448d..58d071255c2 100644
--- a/settings/ajax/openid.php
+++ b/settings/ajax/openid.php
@@ -3,7 +3,7 @@
 // Init owncloud
 require_once('../../lib/base.php');
 
-$l=new OC_L10N('settings');
+$l=OC_L10N::get('settings');
 
 OC_JSON::checkLoggedIn();
 OC_JSON::checkAppEnabled('user_openid');
diff --git a/settings/ajax/setlanguage.php b/settings/ajax/setlanguage.php
index dc1128de2e5..d8d1a860378 100644
--- a/settings/ajax/setlanguage.php
+++ b/settings/ajax/setlanguage.php
@@ -3,7 +3,7 @@
 // Init owncloud
 require_once('../../lib/base.php');
 
-$l=new OC_L10N('settings');
+$l=OC_L10N::get('settings');
 
 OC_JSON::checkLoggedIn();
 
diff --git a/settings/personal.php b/settings/personal.php
index 07030109de7..41499657ac7 100755
--- a/settings/personal.php
+++ b/settings/personal.php
@@ -35,7 +35,7 @@ array_unshift($languageCodes,$lang);
 $languageNames=include 'languageCodes.php';
 $languages=array();
 foreach($languageCodes as $lang){
-	$l=new OC_L10N('settings',$lang);
+	$l=OC_L10N::get('settings',$lang);
 	if(substr($l->t('__language_name__'),0,1)!='_'){//first check if the language name is in the translation file
 		$languages[]=array('code'=>$lang,'name'=>$l->t('__language_name__'));
 	}elseif(isset($languageNames[$lang])){