diff -u b/core/modules/taxonomy/migration_templates/d6_taxonomy_term_translation.yml b/core/modules/taxonomy/migration_templates/d6_taxonomy_term_translation.yml
--- b/core/modules/taxonomy/migration_templates/d6_taxonomy_term_translation.yml
+++ b/core/modules/taxonomy/migration_templates/d6_taxonomy_term_translation.yml
@@ -3,7 +3,7 @@
 migration_tags:
   - Drupal 6
 source:
-  plugin: d6_i18n_taxonomy_term
+  plugin: d6_taxonomy_term_translation
 process:
   # If you are using this file to build a custom migration consider removing
   # the tid field to allow incremental migrations.
reverted:
--- b/core/modules/taxonomy/src/Plugin/migrate/source/d6/I18nTerm.php
+++ /dev/null
@@ -1,27 +0,0 @@
-<?php
-
-namespace Drupal\taxonomy\Plugin\migrate\source\d6;
-
-/**
- * Taxonomy term source from database.
- *
- * @todo Support term_relation, term_synonym table if possible.
- *
- * @MigrateSource(
- *   id = "d6_i18n_taxonomy_term",
- *   source_provider = "taxonomy"
- * )
- */
-class I18nTerm extends Term {
-
-  /**
-   * {@inheritdoc}
-   */
-  public function fields() {
-    $fields = parent::fields();
-    $fields['language'] = $this->t('The term language.');
-    $fields['trid'] = $this->t('Not sure yet.');
-    return $fields;
-  }
-
-}
reverted:
--- b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/I18nTermTest.php
+++ /dev/null
@@ -1,206 +0,0 @@
-<?php
-
-namespace Drupal\Tests\taxonomy\Kernel\Plugin\migrate\source\d6;
-
-use Drupal\Tests\migrate\Kernel\MigrateSqlSourceTestBase;
-
-/**
- * Tests taxonomy term source plugin.
- *
- * @covers \Drupal\taxonomy\Plugin\migrate\source\d6\I18nTerm
- * @group taxonomy
- */
-class I18nTermTest extends MigrateSqlSourceTestBase {
-
-  /**
-   * {@inheritdoc}
-   */
-  public static $modules = ['taxonomy', 'migrate_drupal'];
-
-  /**
-   * {@inheritdoc}
-   */
-  public function providerSource() {
-    $tests = [];
-
-    // The source data.
-    $tests[0]['source_data']['term_data'] = [
-      [
-        'tid' => 1,
-        'vid' => 5,
-        'name' => 'name value 1',
-        'description' => 'description value 1',
-        'weight' => 0,
-        'language' => NULL,
-        'trid' => 0,
-      ],
-      [
-        'tid' => 2,
-        'vid' => 6,
-        'name' => 'name value 2',
-        'description' => 'description value 2',
-        'weight' => 0,
-        'language' => NULL,
-        'trid' => 0,
-      ],
-      [
-        'tid' => 3,
-        'vid' => 6,
-        'name' => 'name value 3',
-        'description' => 'description value 3',
-        'weight' => 0,
-        'language' => NULL,
-        'trid' => 0,
-      ],
-      [
-        'tid' => 4,
-        'vid' => 5,
-        'name' => 'name value 4',
-        'description' => 'description value 4',
-        'weight' => 1,
-        'language' => NULL,
-        'trid' => 0,
-      ],
-      [
-        'tid' => 5,
-        'vid' => 6,
-        'name' => 'name value 5',
-        'description' => 'description value 5',
-        'weight' => 1,
-        'language' => NULL,
-        'trid' => 0,
-      ],
-      [
-        'tid' => 6,
-        'vid' => 6,
-        'name' => 'name value 6',
-        'description' => 'description value 6',
-        'weight' => 0,
-        'language' => NULL,
-        'trid' => 0,
-      ],
-      [
-        'tid' => 10,
-        'vid' => 6,
-        'name' => 'zu - name value 2',
-        'description' => 'zu - description value 2',
-        'weight' => 0,
-        'language' => 'zu',
-        'trid' => 0,
-      ],
-    ];
-    $tests[0]['source_data']['term_hierarchy'] = [
-      [
-        'tid' => 1,
-        'parent' => 0,
-      ],
-      [
-        'tid' => 2,
-        'parent' => 0,
-      ],
-      [
-        'tid' => 3,
-        'parent' => 0,
-      ],
-      [
-        'tid' => 4,
-        'parent' => 1,
-      ],
-      [
-        'tid' => 5,
-        'parent' => 2,
-      ],
-      [
-        'tid' => 6,
-        'parent' => 3,
-      ],
-      [
-        'tid' => 6,
-        'parent' => 2,
-      ],
-      [
-        'tid' => 10,
-        'parent' => 0,
-      ],
-    ];
-
-    // The expected results.
-    $tests[0]['expected_data'] = [
-      [
-        'tid' => 1,
-        'vid' => 5,
-        'name' => 'name value 1',
-        'description' => 'description value 1',
-        'weight' => 0,
-        'parent' => [0],
-        'language' => NULL,
-        'trid' => 0,
-      ],
-      [
-        'tid' => 10,
-        'vid' => 6,
-        'name' => 'zu - name value 2',
-        'description' => 'zu - description value 2',
-        'weight' => 0,
-        'parent' => [0],
-        'language' => 'zu',
-        'trid' => 0,
-      ],
-      [
-        'tid' => 2,
-        'vid' => 6,
-        'name' => 'name value 2',
-        'description' => 'description value 2',
-        'weight' => 0,
-        'parent' => [0],
-        'language' => NULL,
-        'trid' => 0,
-      ],
-      [
-        'tid' => 3,
-        'vid' => 6,
-        'name' => 'name value 3',
-        'description' => 'description value 3',
-        'weight' => 0,
-        'parent' => [0],
-        'language' => NULL,
-        'trid' => 0,
-      ],
-      [
-        'tid' => 4,
-        'vid' => 5,
-        'name' => 'name value 4',
-        'description' => 'description value 4',
-        'weight' => 1,
-        'parent' => [1],
-        'language' => NULL,
-        'trid' => 0,
-      ],
-      [
-        'tid' => 5,
-        'vid' => 6,
-        'name' => 'name value 5',
-        'description' => 'description value 5',
-        'weight' => 1,
-        'parent' => [2],
-        'language' => NULL,
-        'trid' => 0,
-      ],
-      [
-        'tid' => 6,
-        'vid' => 6,
-        'name' => 'name value 6',
-        'description' => 'description value 6',
-        'weight' => 0,
-        'parent' => [3, 2],
-        'language' => NULL,
-        'trid' => 0,
-      ],
-    ];
-
-    $tests[0]['expected_count'] = NULL;
-
-    return $tests;
-  }
-
-}
only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/taxonomy/src/Plugin/migrate/source/d6/TermTranslation.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace Drupal\taxonomy\Plugin\migrate\source\d6;
+
+/**
+ * Taxonomy term source from database.
+ *
+ * @todo Support term_relation, term_synonym table if possible.
+ *
+ * @MigrateSource(
+ *   id = "d6_taxonomy_term_translation",
+ *   source_provider = "taxonomy"
+ * )
+ */
+class TermTranslation extends Term {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function fields() {
+    $fields = parent::fields();
+    $fields['language'] = $this->t('The term language.');
+    $fields['trid'] = $this->t('Not sure yet.');
+    return $fields;
+  }
+
+}
only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/TermTranslationTest.php
@@ -0,0 +1,206 @@
+<?php
+
+namespace Drupal\Tests\taxonomy\Kernel\Plugin\migrate\source\d6;
+
+use Drupal\Tests\migrate\Kernel\MigrateSqlSourceTestBase;
+
+/**
+ * Tests taxonomy term source plugin.
+ *
+ * @covers \Drupal\taxonomy\Plugin\migrate\source\d6\TermTranslation
+ * @group taxonomy
+ */
+class TermTranslationTest extends MigrateSqlSourceTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public static $modules = ['taxonomy', 'migrate_drupal'];
+
+  /**
+   * {@inheritdoc}
+   */
+  public function providerSource() {
+    $tests = [];
+
+    // The source data.
+    $tests[0]['source_data']['term_data'] = [
+      [
+        'tid' => 1,
+        'vid' => 5,
+        'name' => 'name value 1',
+        'description' => 'description value 1',
+        'weight' => 0,
+        'language' => NULL,
+        'trid' => 0,
+      ],
+      [
+        'tid' => 2,
+        'vid' => 6,
+        'name' => 'name value 2',
+        'description' => 'description value 2',
+        'weight' => 0,
+        'language' => NULL,
+        'trid' => 0,
+      ],
+      [
+        'tid' => 3,
+        'vid' => 6,
+        'name' => 'name value 3',
+        'description' => 'description value 3',
+        'weight' => 0,
+        'language' => NULL,
+        'trid' => 0,
+      ],
+      [
+        'tid' => 4,
+        'vid' => 5,
+        'name' => 'name value 4',
+        'description' => 'description value 4',
+        'weight' => 1,
+        'language' => NULL,
+        'trid' => 0,
+      ],
+      [
+        'tid' => 5,
+        'vid' => 6,
+        'name' => 'name value 5',
+        'description' => 'description value 5',
+        'weight' => 1,
+        'language' => NULL,
+        'trid' => 0,
+      ],
+      [
+        'tid' => 6,
+        'vid' => 6,
+        'name' => 'name value 6',
+        'description' => 'description value 6',
+        'weight' => 0,
+        'language' => NULL,
+        'trid' => 0,
+      ],
+      [
+        'tid' => 10,
+        'vid' => 6,
+        'name' => 'zu - name value 2',
+        'description' => 'zu - description value 2',
+        'weight' => 0,
+        'language' => 'zu',
+        'trid' => 0,
+      ],
+    ];
+    $tests[0]['source_data']['term_hierarchy'] = [
+      [
+        'tid' => 1,
+        'parent' => 0,
+      ],
+      [
+        'tid' => 2,
+        'parent' => 0,
+      ],
+      [
+        'tid' => 3,
+        'parent' => 0,
+      ],
+      [
+        'tid' => 4,
+        'parent' => 1,
+      ],
+      [
+        'tid' => 5,
+        'parent' => 2,
+      ],
+      [
+        'tid' => 6,
+        'parent' => 3,
+      ],
+      [
+        'tid' => 6,
+        'parent' => 2,
+      ],
+      [
+        'tid' => 10,
+        'parent' => 0,
+      ],
+    ];
+
+    // The expected results.
+    $tests[0]['expected_data'] = [
+      [
+        'tid' => 1,
+        'vid' => 5,
+        'name' => 'name value 1',
+        'description' => 'description value 1',
+        'weight' => 0,
+        'parent' => [0],
+        'language' => NULL,
+        'trid' => 0,
+      ],
+      [
+        'tid' => 10,
+        'vid' => 6,
+        'name' => 'zu - name value 2',
+        'description' => 'zu - description value 2',
+        'weight' => 0,
+        'parent' => [0],
+        'language' => 'zu',
+        'trid' => 0,
+      ],
+      [
+        'tid' => 2,
+        'vid' => 6,
+        'name' => 'name value 2',
+        'description' => 'description value 2',
+        'weight' => 0,
+        'parent' => [0],
+        'language' => NULL,
+        'trid' => 0,
+      ],
+      [
+        'tid' => 3,
+        'vid' => 6,
+        'name' => 'name value 3',
+        'description' => 'description value 3',
+        'weight' => 0,
+        'parent' => [0],
+        'language' => NULL,
+        'trid' => 0,
+      ],
+      [
+        'tid' => 4,
+        'vid' => 5,
+        'name' => 'name value 4',
+        'description' => 'description value 4',
+        'weight' => 1,
+        'parent' => [1],
+        'language' => NULL,
+        'trid' => 0,
+      ],
+      [
+        'tid' => 5,
+        'vid' => 6,
+        'name' => 'name value 5',
+        'description' => 'description value 5',
+        'weight' => 1,
+        'parent' => [2],
+        'language' => NULL,
+        'trid' => 0,
+      ],
+      [
+        'tid' => 6,
+        'vid' => 6,
+        'name' => 'name value 6',
+        'description' => 'description value 6',
+        'weight' => 0,
+        'parent' => [3, 2],
+        'language' => NULL,
+        'trid' => 0,
+      ],
+    ];
+
+    $tests[0]['expected_count'] = NULL;
+
+    return $tests;
+  }
+
+}