diff --git c/core/modules/locale/lib/Drupal/locale/Form/ImportForm.php w/core/modules/locale/lib/Drupal/locale/Form/ImportForm.php
index 0f19427..43e3fd8 100644
--- c/core/modules/locale/lib/Drupal/locale/Form/ImportForm.php
+++ w/core/modules/locale/lib/Drupal/locale/Form/ImportForm.php
@@ -7,20 +7,37 @@
 
 namespace Drupal\locale\Form;
 
-use Drupal\Core\Form\FormInterface;
-use Symfony\Component\DependencyInjection\ContainerInterface;
+use Drupal\Core\Form\FormBase;
 use Drupal\Core\Language\Language;
+use Drupal\Core\DependencyInjection\ContainerInjectionInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
  * Form constructor for the translation import screen.
  */
-class ImportForm implements FormInterface {
+class ImportForm extends FormBase implements ContainerInjectionInterface {
+  /**
+   * Module Handler Service.
+   *
+   * @var \Drupal\Core\Extension\ModuleHandlerInterface
+   */
+  protected $moduleHandler;
 
+  /**
+   * {@inheritdoc}
+   */
   public static function create(ContainerInterface $container) {
-    return new static();
+    return new static(
+      $container->get('module_handler')
+    );
   }
-
-  public function __construct() {
+  /**
+   * Constructs an ImportForm.
+   *
+   * @param $module_handler \Drupal\Core\Extension\ModuleHandlerInterface
+   */
+  public function __construct(ModuleHandlerInterface $module_handler) {
+    $this->moduleHandler = $module_handler;
   }
 
   /**
@@ -39,7 +56,6 @@ public function getFormID() {
    * @ingroup forms
    */
   public function buildForm(array $form, array &$form_state) {
-    drupal_static_reset('language_list');
     $languages = language_list();
 
     // Initialize a language list to the ones available, including English if we
@@ -62,8 +78,8 @@ public function buildForm(array $form, array &$form_state) {
     else {
       $default = key($existing_languages);
       $language_options = array(
-        t('Existing languages') => $existing_languages,
-        t('Languages not yet added') => language_admin_predefined_list()
+        $this->t('Existing languages') => $existing_languages,
+        $this->t('Languages not yet added') => language_admin_predefined_list()
       );
     }
 
@@ -73,8 +89,8 @@ public function buildForm(array $form, array &$form_state) {
     );
     $form['file'] = array(
       '#type' => 'file',
-      '#title' => t('Translation file'),
-      '#description' => theme('file_upload_help', array('description' => t('A Gettext Portable Object file.'), 'upload_validators' => $validators)),
+      '#title' => $this->t('Translation file'),
+      '#description' => theme('file_upload_help', array('description' => $this->t('A Gettext Portable Object file.'), 'upload_validators' => $validators)),
       '#size' => 50,
       '#upload_validators' => $validators,
       '#attributes' => array('class' => array('file-import-input')),
@@ -86,14 +102,14 @@ public function buildForm(array $form, array &$form_state) {
     );
     $form['langcode'] = array(
       '#type' => 'select',
-      '#title' => t('Language'),
+      '#title' => $this->t('Language'),
       '#options' => $language_options,
       '#default_value' => $default,
       '#attributes' => array('class' => array('langcode-input')),
     );
 
     $form['customized'] = array(
-      '#title' => t('Treat imported strings as custom translations'),
+      '#title' => $this->t('Treat imported strings as custom translations'),
       '#type' => 'checkbox',
     );
     $form['overwrite_options'] = array(
@@ -101,7 +117,7 @@ public function buildForm(array $form, array &$form_state) {
       '#tree' => TRUE,
     );
     $form['overwrite_options']['not_customized'] = array(
-      '#title' => t('Overwrite non-customized translations'),
+      '#title' => $this->t('Overwrite non-customized translations'),
       '#type' => 'checkbox',
       '#states' => array(
         'checked' => array(
@@ -110,7 +126,7 @@ public function buildForm(array $form, array &$form_state) {
       ),
     );
     $form['overwrite_options']['customized'] = array(
-      '#title' => t('Overwrite existing customized translations'),
+      '#title' => $this->t('Overwrite existing customized translations'),
       '#type' => 'checkbox',
     );
 
@@ -119,7 +135,7 @@ public function buildForm(array $form, array &$form_state) {
     );
     $form['actions']['submit'] = array(
       '#type' => 'submit',
-      '#value' => t('Import')
+      '#value' => $this->t('Import')
     );
     return $form;
   }
@@ -127,12 +143,6 @@ public function buildForm(array $form, array &$form_state) {
   /**
    * {@inheritdoc}
    */
-  public function validateForm(array &$form, array &$form_state) {
-  }
-
-  /**
-   * {@inheritdoc}
-   */
   public function submitForm(array &$form, array &$form_state) {
     // Ensure we have the file uploaded.
     if ($file = file_save_upload('file', $form['file']['#upload_validators'], 'translations://', 0)) {
@@ -144,20 +154,20 @@ public function submitForm(array &$form, array &$form_state) {
           'langcode' => $form_state['values']['langcode']
         ));
         $language = language_save($language);
-        drupal_set_message(t('The language %language has been created and can now be used.', array('%language' => $language->name)));
+        drupal_set_message($this->t('The language %language has been created and can now be used.', array('%language' => $language->name)));
       }
       $options = array(
         'langcode' => $form_state['values']['langcode'],
         'overwrite_options' => $form_state['values']['overwrite_options'],
         'customized' => $form_state['values']['customized'] ? LOCALE_CUSTOMIZED : LOCALE_NOT_CUSTOMIZED,
       );
-      \Drupal::moduleHandler()->loadInclude('locale', 'bulk.inc');
+      $this->moduleHandler->loadInclude('locale', 'bulk.inc');
       $file = locale_translate_file_attach_properties($file, $options);
       $batch = locale_translate_batch_build(array($file->uri => $file), $options);
       batch_set($batch);
     }
     else {
-      form_set_error('file', t('File to import not found.'));
+      form_set_error('file', $this->t('File to import not found.'));
       $form_state['rebuild'] = TRUE;
       return;
     }