diff --git a/core/modules/config_translation/src/FormElement/PluralVariants.php b/core/modules/config_translation/src/FormElement/PluralVariants.php
index 3c0fbb9..d45a6bd 100644
--- a/core/modules/config_translation/src/FormElement/PluralVariants.php
+++ b/core/modules/config_translation/src/FormElement/PluralVariants.php
@@ -5,6 +5,7 @@
 use Drupal\Component\Render\FormattableMarkup;
 use Drupal\Core\Config\Config;
 use Drupal\Core\Language\LanguageInterface;
+use Drupal\Core\StringTranslation\PluralTranslatableMarkup;
 use Drupal\language\Config\LanguageConfigOverride;
 
 /**
@@ -17,7 +18,7 @@ class PluralVariants extends FormElementBase {
    */
   protected function getSourceElement(LanguageInterface $source_language, $source_config) {
     $plurals = $this->getNumberOfPlurals($source_language->getId());
-    $values = explode(LOCALE_PLURAL_DELIMITER, $source_config);
+    $values = explode(PluralTranslatableMarkup::DELIMITER, $source_config);
     $element = [
       '#type' => 'fieldset',
       '#title' => new FormattableMarkup('@label <span class="visually-hidden">(@source_language)</span>', [
@@ -46,7 +47,7 @@ protected function getSourceElement(LanguageInterface $source_language, $source_
    */
   protected function getTranslationElement(LanguageInterface $translation_language, $source_config, $translation_config) {
     $plurals = $this->getNumberOfPlurals($translation_language->getId());
-    $values = explode(LOCALE_PLURAL_DELIMITER, $translation_config);
+    $values = explode(PluralTranslatableMarkup::DELIMITER, $translation_config);
     $element = [
       '#type' => 'fieldset',
       '#title' => new FormattableMarkup('@label <span class="visually-hidden">(@translation_language)</span>', [
@@ -72,7 +73,7 @@ protected function getTranslationElement(LanguageInterface $translation_language
    * {@inheritdoc}
    */
   public function setConfig(Config $base_config, LanguageConfigOverride $config_translation, $config_values, $base_key = NULL) {
-    $config_values = implode(LOCALE_PLURAL_DELIMITER, $config_values);
+    $config_values = implode(PluralTranslatableMarkup::DELIMITER, $config_values);
     parent::setConfig($base_config, $config_translation, $config_values, $base_key);
   }
 
diff --git a/core/modules/locale/locale.module b/core/modules/locale/locale.module
index d4ce174..faa48cd 100644
--- a/core/modules/locale/locale.module
+++ b/core/modules/locale/locale.module
@@ -19,6 +19,7 @@
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Routing\RouteMatchInterface;
 use Drupal\Core\Language\LanguageInterface;
+use Drupal\Core\StringTranslation\PluralTranslatableMarkup;
 use Drupal\language\ConfigurableLanguageInterface;
 use Drupal\Component\Utility\Crypt;
 use Drupal\locale\Locale;
@@ -1184,7 +1185,7 @@ function _locale_parse_js_file($filepath) {
   // Add string from Drupal.formatPlural().
   foreach ($plural_matches[1] as $key => $string) {
     $matches[] = [
-      'source'  => _locale_strip_quotes($string) . LOCALE_PLURAL_DELIMITER . _locale_strip_quotes($plural_matches[2][$key]),
+      'source'  => _locale_strip_quotes($string) . PluralTranslatableMarkup::DELIMITER . _locale_strip_quotes($plural_matches[2][$key]),
       'context' => _locale_strip_quotes($plural_matches[3][$key]),
     ];
   }
diff --git a/core/modules/locale/src/Form/TranslateEditForm.php b/core/modules/locale/src/Form/TranslateEditForm.php
index 659d296..9c8a134 100644
--- a/core/modules/locale/src/Form/TranslateEditForm.php
+++ b/core/modules/locale/src/Form/TranslateEditForm.php
@@ -4,6 +4,7 @@
 
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Render\Element;
+use Drupal\Core\StringTranslation\PluralTranslatableMarkup;
 use Drupal\locale\SourceString;
 
 /**
@@ -186,7 +187,7 @@ public function submitForm(array &$form, FormStateInterface $form_state) {
       // Plural translations are saved in a delimited string. To be able to
       // compare the new strings with the existing strings a string in the same
       // format is created.
-      $new_translation_string_delimited = implode(LOCALE_PLURAL_DELIMITER, $new_translation['translations']);
+      $new_translation_string_delimited = implode(PluralTranslatableMarkup::DELIMITER, $new_translation['translations']);
 
       // Generate an imploded string without delimiter, to be able to run
       // empty() on it.
diff --git a/core/modules/locale/src/PoDatabaseWriter.php b/core/modules/locale/src/PoDatabaseWriter.php
index 6ee494d8..dfcd1d7 100644
--- a/core/modules/locale/src/PoDatabaseWriter.php
+++ b/core/modules/locale/src/PoDatabaseWriter.php
@@ -6,6 +6,7 @@
 use Drupal\Component\Gettext\PoItem;
 use Drupal\Component\Gettext\PoReaderInterface;
 use Drupal\Component\Gettext\PoWriterInterface;
+use Drupal\Core\StringTranslation\PluralTranslatableMarkup;
 
 /**
  * Gettext PO writer working with the locale module database.
@@ -188,8 +189,8 @@ public function setHeader(PoHeader $header) {
    */
   public function writeItem(PoItem $item) {
     if ($item->isPlural()) {
-      $item->setSource(implode(LOCALE_PLURAL_DELIMITER, $item->getSource()));
-      $item->setTranslation(implode(LOCALE_PLURAL_DELIMITER, $item->getTranslation()));
+      $item->setSource(implode(PluralTranslatableMarkup::DELIMITER, $item->getSource()));
+      $item->setTranslation(implode(PluralTranslatableMarkup::DELIMITER, $item->getTranslation()));
     }
     $this->importString($item);
   }
diff --git a/core/modules/locale/src/StringBase.php b/core/modules/locale/src/StringBase.php
index 63cd781..b86e1a0 100644
--- a/core/modules/locale/src/StringBase.php
+++ b/core/modules/locale/src/StringBase.php
@@ -2,6 +2,8 @@
 
 namespace Drupal\locale;
 
+use Drupal\Core\StringTranslation\PluralTranslatableMarkup;
+
 /**
  * Defines the locale string base class.
  *
@@ -95,14 +97,14 @@ public function setVersion($version) {
    * {@inheritdoc}
    */
   public function getPlurals() {
-    return explode(LOCALE_PLURAL_DELIMITER, $this->getString());
+    return explode(PluralTranslatableMarkup::DELIMITER, $this->getString());
   }
 
   /**
    * {@inheritdoc}
    */
   public function setPlurals($plurals) {
-    $this->setString(implode(LOCALE_PLURAL_DELIMITER, $plurals));
+    $this->setString(implode(PluralTranslatableMarkup::DELIMITER, $plurals));
     return $this;
   }
 
diff --git a/core/modules/locale/src/StringInterface.php b/core/modules/locale/src/StringInterface.php
index a00dc3e..5f5cc7c 100644
--- a/core/modules/locale/src/StringInterface.php
+++ b/core/modules/locale/src/StringInterface.php
@@ -72,7 +72,8 @@ public function getPlurals();
   /**
    * Sets this string using array of plural values.
    *
-   * Serializes plural variants in one string glued by LOCALE_PLURAL_DELIMITER.
+   * Serializes plural variants in one string glued by
+   * Drupal\Core\StringTranslation\PluralTranslatableMarkup::DELIMITER.
    *
    * @param array $plurals
    *   Array of strings with plural variants.
diff --git a/core/modules/locale/tests/src/Functional/LocaleJavascriptTranslationTest.php b/core/modules/locale/tests/src/Functional/LocaleJavascriptTranslationTest.php
index 1d6fde7..7908878 100644
--- a/core/modules/locale/tests/src/Functional/LocaleJavascriptTranslationTest.php
+++ b/core/modules/locale/tests/src/Functional/LocaleJavascriptTranslationTest.php
@@ -3,6 +3,7 @@
 namespace Drupal\Tests\locale\Functional;
 
 use Drupal\Core\Language\LanguageInterface;
+use Drupal\Core\StringTranslation\PluralTranslatableMarkup;
 use Drupal\Tests\BrowserTestBase;
 use Drupal\Component\Render\FormattableMarkup;
 
@@ -51,7 +52,7 @@ public function testFileParsing() {
         $source_strings[$string->source] = $string->context;
       }
 
-      $etx = LOCALE_PLURAL_DELIMITER;
+      $etx = PluralTranslatableMarkup::DELIMITER;
       // List of all strings that should be in the file.
       $test_strings = [
         'Standard Call t' => '',
diff --git a/core/modules/locale/tests/src/Functional/LocalePluralFormatTest.php b/core/modules/locale/tests/src/Functional/LocalePluralFormatTest.php
index 57916ca..a1ea775 100644
--- a/core/modules/locale/tests/src/Functional/LocalePluralFormatTest.php
+++ b/core/modules/locale/tests/src/Functional/LocalePluralFormatTest.php
@@ -186,7 +186,7 @@ public function testPluralEditDateFormatter() {
     // not save our source string for performance optimization if we do not ask
     // specifically for a language.
     \Drupal::translation()->formatPlural(1, '1 second', '@count seconds', [], ['langcode' => 'fr'])->render();
-    $lid = db_query("SELECT lid FROM {locales_source} WHERE source = :source AND context = ''", [':source' => "1 second" . LOCALE_PLURAL_DELIMITER . "@count seconds"])->fetchField();
+    $lid = db_query("SELECT lid FROM {locales_source} WHERE source = :source AND context = ''", [':source' => "1 second" . PluralTranslatableMarkup::DELIMITER . "@count seconds"])->fetchField();
     // Look up editing page for this plural string and check fields.
     $search = [
       'string' => '1 second',
@@ -270,7 +270,7 @@ public function testPluralEditExport() {
     $this->assertText('@count sati');
 
     // Edit langcode hr translations and see if that took effect.
-    $lid = db_query("SELECT lid FROM {locales_source} WHERE source = :source AND context = ''", [':source' => "1 hour" . LOCALE_PLURAL_DELIMITER . "@count hours"])->fetchField();
+    $lid = db_query("SELECT lid FROM {locales_source} WHERE source = :source AND context = ''", [':source' => "1 hour" . PluralTranslatableMarkup::DELIMITER . "@count hours"])->fetchField();
     $edit = [
       "strings[$lid][translations][1]" => '@count sata edited',
     ];
@@ -296,7 +296,7 @@ public function testPluralEditExport() {
     // not save our source string for performance optimization if we do not ask
     // specifically for a language.
     \Drupal::translation()->formatPlural(1, '1 day', '@count days', [], ['langcode' => 'fr'])->render();
-    $lid = db_query("SELECT lid FROM {locales_source} WHERE source = :source AND context = ''", [':source' => "1 day" . LOCALE_PLURAL_DELIMITER . "@count days"])->fetchField();
+    $lid = db_query("SELECT lid FROM {locales_source} WHERE source = :source AND context = ''", [':source' => "1 day" . PluralTranslatableMarkup::DELIMITER . "@count days"])->fetchField();
     // Look up editing page for this plural string and check fields.
     $search = [
       'string' => '1 day',
diff --git a/core/modules/system/system.module b/core/modules/system/system.module
index ac27414..69bc314 100644
--- a/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -18,6 +18,7 @@
 use Drupal\Core\KeyValueStore\KeyValueDatabaseExpirableFactory;
 use Drupal\Core\PageCache\RequestPolicyInterface;
 use Drupal\Core\PhpStorage\PhpStorageFactory;
+use Drupal\Core\StringTranslation\PluralTranslatableMarkup;
 use Drupal\Core\Routing\RouteMatchInterface;
 use Drupal\Core\Routing\StackedRouteMatchInterface;
 use Drupal\Core\Language\LanguageInterface;
@@ -748,7 +749,7 @@ function system_js_settings_alter(&$settings, AttachedAssetsInterface $assets) {
     }
   }
   if (!isset($settings['pluralDelimiter'])) {
-    $settings['pluralDelimiter'] = LOCALE_PLURAL_DELIMITER;
+    $settings['pluralDelimiter'] = PluralTranslatableMarkup::DELIMITER;
   }
   // Add the theme token to ajaxPageState, ensuring the database is available
   // before doing so. Also add the loaded libraries to ajaxPageState.
diff --git a/core/modules/views/src/Plugin/views/field/NumericField.php b/core/modules/views/src/Plugin/views/field/NumericField.php
index 7511334..b89e01f 100644
--- a/core/modules/views/src/Plugin/views/field/NumericField.php
+++ b/core/modules/views/src/Plugin/views/field/NumericField.php
@@ -30,7 +30,7 @@ protected function defineOptions() {
     $options['decimal'] = ['default' => '.'];
     $options['separator'] = ['default' => ','];
     $options['format_plural'] = ['default' => FALSE];
-    $options['format_plural_string'] = ['default' => '1' . LOCALE_PLURAL_DELIMITER . '@count'];
+    $options['format_plural_string'] = ['default' => '1' . PluralTranslatableMarkup::DELIMITER . '@count'];
     $options['prefix'] = ['default' => ''];
     $options['suffix'] = ['default' => ''];
 
@@ -93,7 +93,7 @@ public function buildOptionsForm(&$form, FormStateInterface $form_state) {
       '#default_value' => $this->options['format_plural_string'],
     ];
 
-    $plural_array = explode(LOCALE_PLURAL_DELIMITER, $this->options['format_plural_string']);
+    $plural_array = explode(PluralTranslatableMarkup::DELIMITER, $this->options['format_plural_string']);
     $plurals = $this->getNumberOfPlurals($this->view->storage->get('langcode'));
     for ($i = 0; $i < $plurals; $i++) {
       $form['format_plural_values'][$i] = [
@@ -139,7 +139,7 @@ public function submitOptionsForm(&$form, FormStateInterface $form_state) {
     // Merge plural format options into one string and drop the individual
     // option values.
     $options = &$form_state->getValue('options');
-    $options['format_plural_string'] = implode(LOCALE_PLURAL_DELIMITER, $options['format_plural_values']);
+    $options['format_plural_string'] = implode(PluralTranslatableMarkup::DELIMITER, $options['format_plural_values']);
     unset($options['format_plural_values']);
     parent::submitOptionsForm($form, $form_state);
   }
diff --git a/core/modules/views/tests/src/Functional/Plugin/NumericFormatPluralTest.php b/core/modules/views/tests/src/Functional/Plugin/NumericFormatPluralTest.php
index 08f2504..37c21af 100644
--- a/core/modules/views/tests/src/Functional/Plugin/NumericFormatPluralTest.php
+++ b/core/modules/views/tests/src/Functional/Plugin/NumericFormatPluralTest.php
@@ -4,6 +4,7 @@
 
 use Drupal\Component\Gettext\PoHeader;
 use Drupal\file\Entity\File;
+use Drupal\Core\StringTranslation\PluralTranslatableMarkup;
 use Drupal\Tests\views\Functional\ViewTestBase;
 
 /**
@@ -45,7 +46,7 @@ public function testNumericFormatPlural() {
     $config = $this->config('views.view.numeric_test');
     $field_config_prefix = 'display.default.display_options.fields.count.';
     $this->assertEqual($config->get($field_config_prefix . 'format_plural'), TRUE);
-    $this->assertEqual($config->get($field_config_prefix . 'format_plural_string'), '1' . LOCALE_PLURAL_DELIMITER . '@count');
+    $this->assertEqual($config->get($field_config_prefix . 'format_plural_string'), '1' . PluralTranslatableMarkup::DELIMITER . '@count');
 
     // Assert that the value is displayed.
     $this->drupalGet('numeric-test');
@@ -64,7 +65,7 @@ public function testNumericFormatPlural() {
     $config = $this->config('views.view.numeric_test');
     $field_config_prefix = 'display.default.display_options.fields.count.';
     $this->assertEqual($config->get($field_config_prefix . 'format_plural'), TRUE);
-    $this->assertEqual($config->get($field_config_prefix . 'format_plural_string'), '1 time' . LOCALE_PLURAL_DELIMITER . '@count times');
+    $this->assertEqual($config->get($field_config_prefix . 'format_plural_string'), '1 time' . PluralTranslatableMarkup::DELIMITER . '@count times');
 
     // Assert that the value is displayed with some sample values.
     $numbers = [0, 1, 2, 3, 4, 42];
@@ -107,7 +108,7 @@ public function testNumericFormatPlural() {
     $config = $this->config('views.view.numeric_test');
     $field_config_prefix = 'display.default.display_options.fields.count.';
     $this->assertEqual($config->get($field_config_prefix . 'format_plural'), TRUE);
-    $this->assertEqual($config->get($field_config_prefix . 'format_plural_string'), implode(LOCALE_PLURAL_DELIMITER, array_values($edit)));
+    $this->assertEqual($config->get($field_config_prefix . 'format_plural_string'), implode(PluralTranslatableMarkup::DELIMITER, array_values($edit)));
 
     // The view should now use the new plural configuration.
     $this->drupalGet('sl/numeric-test');
@@ -120,7 +121,7 @@ public function testNumericFormatPlural() {
 
     // Add an English configuration translation with English plurals.
     $english = \Drupal::languageManager()->getLanguageConfigOverride('en', 'views.view.numeric_test');
-    $english->set('display.default.display_options.fields.count.format_plural_string', '1 time' . LOCALE_PLURAL_DELIMITER . '@count times')->save();
+    $english->set('display.default.display_options.fields.count.format_plural_string', '1 time' . PluralTranslatableMarkup::DELIMITER . '@count times')->save();
 
     // The view displayed in English should use the English translation.
     $this->drupalGet('numeric-test');