diff --git a/src/Entity/Paragraph.php b/src/Entity/Paragraph.php
index 0b430bb..ed65403 100644
--- a/src/Entity/Paragraph.php
+++ b/src/Entity/Paragraph.php
@@ -87,6 +87,13 @@ class Paragraph extends ContentEntityBase implements ParagraphInterface, EntityN
   protected $unserializedBehaviorSettings;
 
   /**
+   * Number of summaries.
+   *
+   * @var int
+   */
+  protected $summaryCount;
+
+  /**
    * {@inheritdoc}
    */
   public function getParentEntity() {
@@ -434,28 +441,28 @@ class Paragraph extends ContentEntityBase implements ParagraphInterface, EntityN
   /**
    * {@inheritdoc}
    */
-  public function getSummary($nested = FALSE) {
+  public function getSummary() {
     $summary = [];
-    $count = 0;
+    $this->summaryCount = 0;
     foreach ($this->getFieldDefinitions() as $field_name => $field_definition) {
       if ($field_definition->getType() == 'image' || $field_definition->getType() == 'file') {
         $file_summary = $this->getFileSummary($field_name);
         if ($file_summary != '') {
-          $count += 1;
+          $this->summaryCount++;
           $summary[] = $file_summary;
         }
       }
 
       $text_summary = $this->getTextSummary($field_name, $field_definition);
       if ($text_summary != '') {
-        $count += 1;
+        $this->summaryCount++;
         $summary[] = $text_summary;
       }
 
       if ($field_definition->getType() == 'entity_reference_revisions') {
         $nested_summary = $this->getNestedSummary($field_name);
         if ($nested_summary != '') {
-          $count += 1;
+          $this->summaryCount++;
           $summary[] = $nested_summary;
         }
       }
@@ -463,7 +470,7 @@ class Paragraph extends ContentEntityBase implements ParagraphInterface, EntityN
       if ($field_type = $field_definition->getType() == 'entity_reference') {
         if (!in_array($field_name, ['type', 'uid', 'revision_uid'])) {
           if ($this->get($field_name)->entity) {
-            $count += 1;
+            $this->summaryCount++;
             $summary[] = $this->get($field_name)->entity->label();
           }
         }
@@ -479,14 +486,22 @@ class Paragraph extends ContentEntityBase implements ParagraphInterface, EntityN
     }
 
     $collapsed_summary_text = implode(', ', $summary);
+    return strip_tags($collapsed_summary_text);
+  }
 
-    if ($nested == TRUE) {
-      return [
-        'count' => $count,
-        'summary' => strip_tags($collapsed_summary_text),
-      ];
+  /**
+   * Gets the number of summaries.
+   *
+   * @return int
+   *   The number of summaries. Can be 0.
+   */
+  protected function getSummaryCount() {
+    if ($this->summaryCount !== NULL) {
+      return $this->summaryCount;
     }
-    return strip_tags($collapsed_summary_text);
+
+    $this->getSummary();
+    return $this->summaryCount;
   }
 
   /**
@@ -538,30 +553,23 @@ class Paragraph extends ContentEntityBase implements ParagraphInterface, EntityN
    *   Short summary for nested paragraphs type.
    */
   protected function getNestedSummary($field_name) {
-    $count = 0;
     $summary = [];
+    $summary_count = 0;
     foreach ($this->{$field_name}->getValue() as $value) {
       if (isset($value['entity'])) {
         $paragraph_entity = $value['entity'];
         if ($paragraph_entity instanceof ParagraphInterface) {
-          $info = $paragraph_entity->getSummary(TRUE);
-          $count += $info['count'];
-          $summary[] = trim($info['summary']);
+          $summary[] = $paragraph_entity->getSummary();
+          $summary_count += $paragraph_entity->getSummaryCount();
         }
       }
     }
 
-    if ($count == 1) {
-      return t('1 Child: @summary', [
-        '@summary' => $summary[0],
-      ]);
-    }
-    else {
-      return t('@count Children: @summary', [
-        '@count' => $count,
+    return \Drupal::translation()
+      ->formatPlural($summary_count, '1 Child | @summary', '@count Children | @summary', [
+        '@count' => $summary_count,
         '@summary' => implode(', ', $summary),
       ]);
-    }
   }
 
   /**
diff --git a/src/ParagraphInterface.php b/src/ParagraphInterface.php
index aa2c1f9..5cdbcc8 100644
--- a/src/ParagraphInterface.php
+++ b/src/ParagraphInterface.php
@@ -25,12 +25,9 @@ interface ParagraphInterface extends ContentEntityInterface, EntityOwnerInterfac
   /**
    * Returns short summary for paragraph.
    *
-   * @param $nested bool
-   *   Indicates if the summary is for a nested paragraph.
-   *
-   * @return string|array
-   *   The text without tags or array of values for the nested paragraph.
+   * @return string
+   *   The text without tags.
    */
-  public function getSummary($nested);
+  public function getSummary();
 
 }
diff --git a/src/Tests/Experimental/ParagraphsExperimentalBehaviorsTest.php b/src/Tests/Experimental/ParagraphsExperimentalBehaviorsTest.php
index e1cbdb9..d4b4c61 100644
--- a/src/Tests/Experimental/ParagraphsExperimentalBehaviorsTest.php
+++ b/src/Tests/Experimental/ParagraphsExperimentalBehaviorsTest.php
@@ -190,7 +190,7 @@ class ParagraphsExperimentalBehaviorsTest extends ParagraphsExperimentalTestBase
     // Assert that the summary includes the text of the behavior plugins.
     $this->clickLink('Edit');
     $this->assertRaw('class="paragraphs-collapsed-description">first_paragraph, Text color: blue, Bold: Yes');
-    $this->assertRaw('class="paragraphs-collapsed-description">0 Children: , Bold: Yes');
+    $this->assertRaw('class="paragraphs-collapsed-description">0 Children | , Bold: Yes');
   }
 
   /**