reverted:
--- b/core/modules/taxonomy/src/Plugin/migrate/source/d6/TaxonomyVocabularyTranslation.php
+++ /dev/null
@@ -1,71 +0,0 @@
-<?php
-
-namespace Drupal\taxonomy\Plugin\migrate\source\d6;
-
-use Drupal\migrate_drupal\Plugin\migrate\source\DrupalSqlBase;
-
-/**
- * Profile field source from database.
- *
- * @MigrateSource(
- *   id = "d6_taxonomy_vocabulary_translation",
- *   source_provider = "taxonomy"
- * )
- */
-class TaxonomyVocabularyTranslation extends DrupalSqlBase {
-
-  /**
-   * The source table containing field info.
-   *
-   * @var string
-   */
-  protected $fieldTable;
-
-  /**
-   * The source table containing the field values.
-   *
-   * @var string
-   */
-  protected $valueTable;
-
-  /**
-   * {@inheritdoc}
-   */
-  public function query() {
-    $query = $this->select('vocabulary', 'v')
-      ->fields('v', ['vid', 'name', 'description'])
-      ->fields('i18n', ['lid', 'type', 'property', 'objectid'])
-      ->fields('lt', ['lid', 'translation'])
-      ->condition('i18n.type', 'vocabulary');
-    $query->addField('lt', 'language', 'language');
-    // The i18n_strings table has two columns containing the object ID, objectid
-    // and objectindex. The objectid column is a text field. Therefore, for the
-    // join to work in PostgreSQL, use the objectindex field as this is numeric
-    // like the vid field.
-    $query->join('i18n_strings', 'i18n', 'v.vid = i18n.objectindex');
-    $query->leftJoin('locales_target', 'lt', 'lt.lid = i18n.lid');
-
-    return $query;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function fields() {
-    return [
-      'vid' => $this->t('The vocabulary ID.'),
-      'language' => $this->t('Language for this field.'),
-      'property' => $this->t('Name of property being translated.'),
-      'translation' => $this->t('Translation of either the title or explanation.'),
-    ];
-  }
-
-  /**
-   * {@inheritdoc}
-   */
-  public function getIds() {
-    $ids['vid']['type'] = 'integer';
-    return $ids;
-  }
-
-}
diff -u b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/VocabularyTranslationTest.php b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/VocabularyTranslationTest.php
--- b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/VocabularyTranslationTest.php
+++ b/core/modules/taxonomy/tests/src/Kernel/Plugin/migrate/source/d6/VocabularyTranslationTest.php
@@ -7,7 +7,7 @@
 /**
  * Tests D6 i18n vocabulary source plugin.
  *
- * @covers \Drupal\taxonomy\Plugin\migrate\source\d6\TaxonomyVocabularyTranslation
+ * @covers \Drupal\taxonomy\Plugin\migrate\source\d6\VocabularyTranslation
  * @group taxonomy
  */
 class VocabularyTranslationTest extends MigrateSqlSourceTestBase {
only in patch2:
unchanged:
--- /dev/null
+++ b/core/modules/taxonomy/src/Plugin/migrate/source/d6/VocabularyTranslation.php
@@ -0,0 +1,57 @@
+<?php
+
+namespace Drupal\taxonomy\Plugin\migrate\source\d6;
+
+use Drupal\migrate_drupal\Plugin\migrate\source\DrupalSqlBase;
+
+/**
+ * Drupal 6 vocabulary translations from source database.
+ *
+ * @MigrateSource(
+ *   id = "d6_taxonomy_vocabulary_translation",
+ *   source_provider = "taxonomy"
+ * )
+ */
+class VocabularyTranslation extends DrupalSqlBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function query() {
+    $query = $this->select('vocabulary', 'v')
+      ->fields('v', ['vid', 'name', 'description'])
+      ->fields('i18n', ['lid', 'type', 'property', 'objectid'])
+      ->fields('lt', ['lid', 'translation'])
+      ->condition('i18n.type', 'vocabulary');
+    $query->addField('lt', 'language', 'language');
+    // The i18n_strings table has two columns containing the object ID, objectid
+    // and objectindex. The objectid column is a text field. Therefore, for the
+    // join to work in PostgreSQL, use the objectindex field as this is numeric
+    // like the vid field.
+    $query->join('i18n_strings', 'i18n', 'v.vid = i18n.objectindex');
+    $query->leftJoin('locales_target', 'lt', 'lt.lid = i18n.lid');
+
+    return $query;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function fields() {
+    return [
+      'vid' => $this->t('The vocabulary ID.'),
+      'language' => $this->t('Language for this field.'),
+      'property' => $this->t('Name of property being translated.'),
+      'translation' => $this->t('Translation of either the title or explanation.'),
+    ];
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getIds() {
+    $ids['vid']['type'] = 'integer';
+    return $ids;
+  }
+
+}