diff --git a/ChangeLog b/ChangeLog
index 29690cb8f2..9ae6a2bfc1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -58,6 +58,7 @@ phpMyAdmin - ChangeLog
 - issue        Added description for the _ks (kana-sensitive) collation suffix
 - issue        Added description for the _nopad (NO PAD) collation suffix
 - issue #15404 Remove array/string curly braces access
+- issue #15427 Fixed "FilterLanguages" option does not work (configuration)
 
 4.9.0.1 (2019-06-04)
 - issue #14478 phpMyAdmin no longer streams the export data
diff --git a/libraries/classes/LanguageManager.php b/libraries/classes/LanguageManager.php
index 22966ca782..6dd75c6cfe 100644
--- a/libraries/classes/LanguageManager.php
+++ b/libraries/classes/LanguageManager.php
@@ -731,11 +731,12 @@ class LanguageManager
     public function availableLocales()
     {
         if (! $this->_available_locales) {
-            if (empty($GLOBALS['cfg']['FilterLanguages'])) {
+
+            if (! isset($GLOBALS['PMA_Config']) || empty($GLOBALS['PMA_Config']->get('FilterLanguages'))) {
                 $this->_available_locales = $this->listLocaleDir();
             } else {
                 $this->_available_locales = preg_grep(
-                    '@' . $GLOBALS['cfg']['FilterLanguages'] . '@',
+                    '@' . $GLOBALS['PMA_Config']->get('FilterLanguages') . '@',
                     $this->listLocaleDir()
                 );
             }
diff --git a/test/classes/LanguageTest.php b/test/classes/LanguageTest.php
index 4907431979..a557c37977 100644
--- a/test/classes/LanguageTest.php
+++ b/test/classes/LanguageTest.php
@@ -54,13 +54,13 @@ class LanguageTest extends PmaTestCase
      */
     public function testAvailable()
     {
-        $GLOBALS['cfg']['FilterLanguages'] = 'cs|en$';
+        $GLOBALS['PMA_Config']->set('FilterLanguages', 'cs|en$');
 
         $langs = $this->manager->availableLocales();
 
         $this->assertCount(2, $langs);
         $this->assertContains('cs', $langs);
-        $GLOBALS['cfg']['FilterLanguages'] = '';
+        $GLOBALS['PMA_Config']->set('FilterLanguages', '');
     }
 
     /**
@@ -70,7 +70,7 @@ class LanguageTest extends PmaTestCase
      */
     public function testAllAvailable()
     {
-        $GLOBALS['cfg']['FilterLanguages'] = '';
+        $GLOBALS['PMA_Config']->set('FilterLanguages', '');
 
         $langs = $this->manager->availableLocales();