diff --git a/core/modules/config_translation/src/FormElement/PluralVariants.php b/core/modules/config_translation/src/FormElement/PluralVariants.php
index c7c6a88..a71d8fc 100644
--- a/core/modules/config_translation/src/FormElement/PluralVariants.php
+++ b/core/modules/config_translation/src/FormElement/PluralVariants.php
@@ -38,7 +38,7 @@ protected function getSourceElement(LanguageInterface $source_language, $source_
         )),
         '#markup' => SafeMarkup::format('<span lang="@lancode">@value</span>', array(
           '@langcode' => $source_language->getId(),
-          '@value' => $values[$i] ?: $this->t('(Empty)'),
+          '@value' => isset($values[$i]) ? $values[$i] : $this->t('(Empty)'),
         )),
       );
     }
diff --git a/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php b/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
index 172bc8e..4bbb408 100644
--- a/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
+++ b/core/modules/config_translation/src/Tests/ConfigTranslationUiTest.php
@@ -611,6 +611,49 @@ public function testViewsTranslationUI() {
   }
 
   /**
+   * Test the number of source elements for plural strings in config translation forms.
+   */
+  public function testPluralConfigStringsSourceElements() {
+    $this->drupalLogin($this->adminUser);
+
+    // Languages to test, with various number of plural forms.
+    $languages = array(
+      'vi' => array('plurals' => 1, 'expected' => array(TRUE, FALSE, FALSE, FALSE)),
+      'fr' => array('plurals' => 2, 'expected' => array(TRUE, TRUE, FALSE, FALSE)),
+      'sl' => array('plurals' => 4, 'expected' => array(TRUE, TRUE, TRUE, TRUE)),
+    );
+
+    foreach ($languages as $langcode => $data) {
+      // Import a .po file to add a new language with a given number of plural forms
+      $name = tempnam('temporary://', $langcode . '_') . '.po';
+      file_put_contents($name, $this->getPoFile($data['plurals']));
+      $this->drupalPostForm('admin/config/regional/translate/import', array(
+        'langcode' => $langcode,
+        'files[file]' => $name,
+      ), t('Import'));
+
+      // Change the config langcode of the 'files' view.
+      $config = \Drupal::service('config.factory')->getEditable('views.view.files');
+      $config->set('langcode', $langcode);
+      $config->save();
+
+      // Go to the translation page of the 'files' view.
+      $translation_url = 'admin/structure/views/view/files/translate/' . $langcode . '/add';
+      $this->drupalGet($translation_url);
+
+      // Check if the expected number of source elements are present.
+      foreach ($data['expected'] as $index => $expected) {
+        if ($expected) {
+          $this->assertRaw('edit-source-config-names-viewsviewfiles-display-default-display-options-fields-count-format-plural-string-' . $index);
+        }
+        else {
+          $this->assertNoRaw('edit-source-config-names-viewsviewfiles-display-default-display-options-fields-count-format-plural-string-' . $index);
+        }
+      }
+    }
+  }
+
+  /**
    * Test translation of plural strings with multiple plural forms in config.
    */
   public function testPluralConfigStrings() {
@@ -619,7 +662,7 @@ public function testPluralConfigStrings() {
     // First import a .po file with multiple plural forms.
     // This will also automatically add the 'sl' language.
     $name = tempnam('temporary://', "sl_") . '.po';
-    file_put_contents($name, $this->getPoFile());
+    file_put_contents($name, $this->getPoFile(4));
     $this->drupalPostForm('admin/config/regional/translate/import', array(
       'langcode' => 'sl',
       'files[file]' => $name,
@@ -985,10 +1028,32 @@ protected function assertDisabledTextarea($id) {
   }
 
   /**
-   * Helper function that returns a .po file with multiple plural forms.
+   * Helper function that returns a .po file with a given number of plural forms.
    */
-  public function getPoFile() {
-    return <<< EOF
+  public function getPoFile($plurals) {
+    $po_file = array();
+
+    $po_file[1] = <<< EOF
+msgid ""
+msgstr ""
+"Project-Id-Version: Drupal 8\\n"
+"MIME-Version: 1.0\\n"
+"Content-Type: text/plain; charset=UTF-8\\n"
+"Content-Transfer-Encoding: 8bit\\n"
+"Plural-Forms: nplurals=1; plural=0;\\n"
+EOF;
+
+    $po_file[2] = <<< EOF
+msgid ""
+msgstr ""
+"Project-Id-Version: Drupal 8\\n"
+"MIME-Version: 1.0\\n"
+"Content-Type: text/plain; charset=UTF-8\\n"
+"Content-Transfer-Encoding: 8bit\\n"
+"Plural-Forms: nplurals=2; plural=(n>1);\\n"
+EOF;
+
+    $po_file[4] = <<< EOF
 msgid ""
 msgstr ""
 "Project-Id-Version: Drupal 8\\n"
@@ -997,6 +1062,8 @@ public function getPoFile() {
 "Content-Transfer-Encoding: 8bit\\n"
 "Plural-Forms: nplurals=4; plural=(((n%100)==1)?(0):(((n%100)==2)?(1):((((n%100)==3)||((n%100)==4))?(2):3)));\\n"
 EOF;
+
+    return $po_file[$plurals];
   }
 
 }