.../Kernel/EntityEmbedFilterTranslationTest.php    | 53 +++++++++++++---------
 1 file changed, 31 insertions(+), 22 deletions(-)

diff --git a/tests/src/Kernel/EntityEmbedFilterTranslationTest.php b/tests/src/Kernel/EntityEmbedFilterTranslationTest.php
index 7562ddf..7d55fb2 100644
--- a/tests/src/Kernel/EntityEmbedFilterTranslationTest.php
+++ b/tests/src/Kernel/EntityEmbedFilterTranslationTest.php
@@ -69,14 +69,14 @@ class EntityEmbedFilterTranslationTest extends EntityEmbedFilterTestBase {
    *
    * @dataProvider providerTestFilterTranslations
    */
-  public function testFilterTranslations($data_langcode_attribute, $expected_title_langcode) {
-    $content = $this->createEmbedCode( [
+  public function testFilterTranslations($text_langcode, $data_langcode, $expected_title_langcode) {
+    $text = $this->createEmbedCode( [
       'data-entity-type' => 'node',
       'data-entity-uuid' => 'e7a3e1fe-b69b-417e-8ee4-c80cb7640e63',
       'data-view-mode' => 'teaser',
       'data-entity-embed-display' => 'entity_reference:entity_reference_label',
       'data-entity-embed-settings' => '{"link":"0"}',
-      'data-langcode' => $data_langcode_attribute,
+      'data-langcode' => $data_langcode,
     ]);
 
     // Translate the embedded entity to the same language as the context (i.e.
@@ -85,9 +85,7 @@ class EntityEmbedFilterTranslationTest extends EntityEmbedFilterTestBase {
       ->setTitle('Embed em portugues')
       ->save();
 
-    // The embedded entity's language is explicitly specified and therefore does
-    // not depend on the context. Prove by specifying a non-existent language.
-    $this->applyFilter($content, $this->randomMachineName());
+    $this->applyFilter($text, $text_langcode);
     $this->assertRaw($this->node->getTranslation($expected_title_langcode)->getTitle());
   }
 
@@ -95,24 +93,35 @@ class EntityEmbedFilterTranslationTest extends EntityEmbedFilterTestBase {
    * Data provider for testFilterTranslations.
    */
   public function providerTestFilterTranslations() {
-    return [
-      'Change the translated context to explicitly embed the untranslated entity' => [
-        'data-langcode' => 'en',
-        'en',
-      ],
-      'Change the untranslated context to explicitly embed the Portugues translation of the embedded entity.' => [
-        'data-langcode' => 'pt-br',
-        'pt-br',
-      ],
-      'Change the translated context to explicitly embed a non-existing translation, en' => [
-        'data-langcode' => 'nl',
+    foreach (['en', 'pt-br', 'nl'] as $text_langcode) {
+      // When the embedded entity has a translation for the language code in the
+      // `data-langcode` attribute, that translation is used, regardless of the
+      // language of the text (which is set to the language of the host entity).
+      foreach (['en', 'pt-br'] as $data_langcode) {
+        yield "text_langcode=$text_langcode (✅); data-langcode=$data_langcode (✅) ⇒ $data_langcode" => [
+          $text_langcode,
+          $data_langcode,
+          $data_langcode,
+        ];
+      }
+
+      // When specifying a (valid) language code but the embedded entity has no
+      // translation for that language, it falls back to the default translation
+      // of the embedded entity.
+      yield "text_langcode=$text_langcode (✅); data-langcode=nl (🚫) ⇒ en" => [
+        $text_langcode,
+        'nl',
         'en',
-      ],
-      'Change the translated context to explicitly embed a non-existing translation, pt-br' => [
-        'data-langcode' => 'nl',
+      ];
+
+      // When specifying a invalid language code, it falls back to the default
+      // translation of the embedded entity.
+      yield "text_langcode=$text_langcode (✅); data-langcode=non-existing-and-even-invalid-langcode (🚫) ⇒ en" => [
+        'text_langcode' => $text_langcode,
+        'data-langcode' => 'non-existing-and-even-invalid-langcode',
         'en',
-      ],
-    ];
+      ];
+    }
   }
 
 }