diff --git a/modules/simpletest/drupal_web_test_case.php b/modules/simpletest/drupal_web_test_case.php
index b67c478..05c8f53 100644
--- a/modules/simpletest/drupal_web_test_case.php
+++ b/modules/simpletest/drupal_web_test_case.php
@@ -1364,10 +1364,13 @@ class DrupalWebTestCase extends DrupalTestCase {
    * @see DrupalWebTestCase::tearDown()
    */
   protected function prepareEnvironment() {
-    global $user, $language, $conf;
+    global $user, $conf;
 
     // Store necessary current values before switching to prefixed database.
-    $this->originalLanguage = $language;
+    $this->originalLanguages = array();
+    foreach (drupal_language_types() as $language_type => $_) {
+      $this->originalLanguages[$language_type] = $GLOBALS[$language_type];
+    }
     $this->originalLanguageDefault = variable_get('language_default');
     $this->originalFileDirectory = variable_get('file_public_path', conf_path() . '/files');
     $this->originalProfile = drupal_get_profile();
@@ -1377,7 +1380,9 @@ class DrupalWebTestCase extends DrupalTestCase {
     // Set to English to prevent exceptions from utf8_truncate() from t()
     // during install if the current language is not 'en'.
     // The following array/object conversion is copied from language_default().
-    $language = (object) array('language' => 'en', 'name' => 'English', 'native' => 'English', 'direction' => 0, 'enabled' => 1, 'plurals' => 0, 'formula' => '', 'domain' => '', 'prefix' => '', 'weight' => 0, 'javascript' => '');
+    foreach (drupal_language_types() as $language_type => $_) {
+      $GLOBALS[$language_type] = (object) array('language' => 'en', 'name' => 'English', 'native' => 'English', 'direction' => 0, 'enabled' => 1, 'plurals' => 0, 'formula' => '', 'domain' => '', 'prefix' => '', 'weight' => 0, 'javascript' => '');
+    }
 
     // Save and clean the shutdown callbacks array because it is static cached
     // and will be changed by the test run. Otherwise it will contain callbacks
@@ -1626,7 +1631,7 @@ class DrupalWebTestCase extends DrupalTestCase {
    * and reset the database prefix.
    */
   protected function tearDown() {
-    global $user, $language;
+    global $user;
 
     // In case a fatal error occurred that was not in the test process read the
     // log to pick up any fatal errors.
@@ -1689,8 +1694,10 @@ class DrupalWebTestCase extends DrupalTestCase {
     // Reset public files directory.
     $GLOBALS['conf']['file_public_path'] = $this->originalFileDirectory;
 
-    // Reset language.
-    $language = $this->originalLanguage;
+    // Reset languages.
+    foreach (drupal_language_types() as $language_type => $_) {
+      $GLOBALS[$language_type] = $this->originalLanguages[$language_type];
+    }
     if ($this->originalLanguageDefault) {
       $GLOBALS['conf']['language_default'] = $this->originalLanguageDefault;
     }