diff --git a/Admin/Install/Interfaces/DatabaseExchanger/ExchangeTrait.php b/Admin/Install/Interfaces/DatabaseExchanger/ExchangeTrait.php
index a2ac0cb..342859a 100755
--- a/Admin/Install/Interfaces/DatabaseExchanger/ExchangeTrait.php
+++ b/Admin/Install/Interfaces/DatabaseExchanger/ExchangeTrait.php
@@ -49,9 +49,9 @@ trait ExchangeTrait
         $settingData = $setting->getData();
 
         $lang             = [];
-        $lang['Exchange'] = include __DIR__ . '/Lang/' . $request->getLanguage() . '.lang.php';
+        $lang['Exchange'] = include __DIR__ . '/Lang/' . $request->header->l11n->language . '.lang.php';
 
-        $this->l11n->loadLanguage($request->header->l11n->getLanguage(), 'Exchange', $lang);
+        $this->l11n->loadLanguage($request->header->l11n->language, 'Exchange', $lang);
 
         $importConnection = ($settingData['import']['db']['self'] ?? true)
             ? $this->local ?? new NullConnection()
diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index 3d9621a..51dc40b 100755
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -187,7 +187,7 @@ final class BackendController extends Controller
 
         $lang = include $interface->source->getAbsolutePath()
             . $interface->source->name
-            . '/Lang/' . $response->getLanguage() . '.lang.php';
+            . '/Lang/' . $response->header->l11n->language . '.lang.php';
 
         $view->addData('lang', $lang);
 
@@ -224,7 +224,7 @@ final class BackendController extends Controller
 
         $lang = include $interface->source->getAbsolutePath()
             . $interface->source->name
-            . '/Lang/' . $response->getLanguage() . '.lang.php';
+            . '/Lang/' . $response->header->l11n->language . '.lang.php';
 
         $view->addData('lang', $lang);
 
diff --git a/tests/Interfaces/OMS/Exporter.php b/tests/Interfaces/OMS/Exporter.php
index dd83a58..061dcfb 100755
--- a/tests/Interfaces/OMS/Exporter.php
+++ b/tests/Interfaces/OMS/Exporter.php
@@ -70,9 +70,9 @@ final class Exporter extends ExporterAbstract
         $this->account = $request->header->account;
 
         $lang             = [];
-        $lang['Exchange'] = include __DIR__ . '/Lang/' . $request->getLanguage() . '.lang.php';
+        $lang['Exchange'] = include __DIR__ . '/Lang/' . $request->header->l11n->language . '.lang.php';
 
-        $this->l11n->loadLanguage($request->header->l11n->getLanguage(), 'Exchange', $lang);
+        $this->l11n->loadLanguage($request->header->l11n->language, 'Exchange', $lang);
 
         $result = [];
 
@@ -82,7 +82,7 @@ final class Exporter extends ExporterAbstract
             $log            = new ExchangeLog();
             $log->createdBy = $this->account;
             $log->setType(ExchangeType::EXPORT);
-            $log->message  = $this->l11n->getText($request->header->l11n->getLanguage(), 'Exchange', '', 'LangFileExported');
+            $log->message  = $this->l11n->getText($request->header->l11n->language, 'Exchange', '', 'LangFileExported');
             $log->subtype  = 'language';
             $log->exchange = (int) $request->getData('id');
 
diff --git a/tests/Interfaces/OMS/Importer.php b/tests/Interfaces/OMS/Importer.php
index b91108e..064a9f0 100755
--- a/tests/Interfaces/OMS/Importer.php
+++ b/tests/Interfaces/OMS/Importer.php
@@ -71,9 +71,9 @@ final class Importer extends ImporterAbstract
         $end   = new \DateTime($request->getData('end') ?? 'now');
 
         $lang             = [];
-        $lang['Exchange'] = include __DIR__ . '/Lang/' . $request->getLanguage() . '.lang.php';
+        $lang['Exchange'] = include __DIR__ . '/Lang/' . $request->header->l11n->language . '.lang.php';
 
-        $this->l11n->loadLanguage($request->header->l11n->getLanguage(), 'Exchange', $lang);
+        $this->l11n->loadLanguage($request->header->l11n->language, 'Exchange', $lang);
 
         if ($request->hasData('db')) {
             $this->remote = ConnectionFactory::create([
@@ -102,7 +102,7 @@ final class Importer extends ImporterAbstract
             $log            = new ExchangeLog();
             $log->createdBy = $this->account;
             $log->setType(ExchangeType::IMPORT);
-            $log->message  = $this->l11n->getText($request->header->l11n->getLanguage(), 'Exchange', '', 'LangFileImported');
+            $log->message  = $this->l11n->getText($request->header->l11n->language, 'Exchange', '', 'LangFileImported');
             $log->subtype  = 'language';
             $log->exchange = (int) $request->getData('id');