diff --git a/src/CoreBundle/EventListener/DcGeneral/DefinitionBuilder/CommandBuilder.php b/src/CoreBundle/EventListener/DcGeneral/DefinitionBuilder/CommandBuilder.php
index 8dbf8db1d..628736d88 100644
--- a/src/CoreBundle/EventListener/DcGeneral/DefinitionBuilder/CommandBuilder.php
+++ b/src/CoreBundle/EventListener/DcGeneral/DefinitionBuilder/CommandBuilder.php
@@ -183,10 +183,11 @@ private function addEditMultipleCommand(Contao2BackendViewDefinitionInterface $v
             ->setLabel('editAll.label')
             ->setDescription('editAll.description');
 
-        $parameters        = $command->getParameters();
-        $parameters['act'] = 'select';
-        $extra             = $command->getExtra();
-        $extra['class']    = 'header_edit_all';
+        $parameters           = $command->getParameters();
+        $parameters['act']    = 'select';
+        $parameters['select'] = 'models';
+        $extra                = $command->getExtra();
+        $extra['class']       = 'header_edit_all';
 
         $commands->addCommand($command);
     }
diff --git a/src/Helper/LocaleUtil.php b/src/Helper/LocaleUtil.php
index e602d2b5e..99e0f8302 100644
--- a/src/Helper/LocaleUtil.php
+++ b/src/Helper/LocaleUtil.php
@@ -36,16 +36,7 @@ final class LocaleUtil
      */
     public static function formatAsLanguageTag(string $localeId): string
     {
-        $packages = System::getContainer()->getParameter('kernel.packages');
-        assert(is_array($packages));
-        $coreVersion = $packages['contao/core-bundle'] ?? '';
-
-        if (\version_compare($coreVersion, '4.13', '>=')) {
-            return self::formatAsLocale($localeId);
-        }
-
-        // Legacy call.
-        return \str_replace('_', '-', ContaoLocaleUtil::formatAsLocale($localeId));
+        return self::formatAsLocale($localeId);
     }
 
     /**
diff --git a/src/TranslatedMetaModel.php b/src/TranslatedMetaModel.php
index be072a7d5..b83d5aa54 100644
--- a/src/TranslatedMetaModel.php
+++ b/src/TranslatedMetaModel.php
@@ -136,7 +136,7 @@ public function selectLanguage(string $activeLanguage): string
     protected function fetchTranslatedAttributeValues(ITranslated $attribute, $ids)
     {
         // @deprecated usage of TL_LANGUAGE - remove for Contao 5.0.
-        $originalLanguage       = LocaleUtil::formatAsLocale($GLOBALS['TL_LANGUAGE']);
+        $originalLanguage       = LocaleUtil::formatAsLocale($GLOBALS['TL_LANGUAGE'] ?? 'en');
         $GLOBALS['TL_LANGUAGE'] = LocaleUtil::formatAsLanguageTag($this->getLanguage());
 
         try {