diff --git a/classes/author/Author.php b/classes/author/Author.php
index 8db937368c3..11b3399821d 100644
--- a/classes/author/Author.php
+++ b/classes/author/Author.php
@@ -17,6 +17,7 @@
  */
 
 namespace PKP\author;
+
 use PKP\facades\Locale;
 use PKP\identity\Identity;
 use PKP\userGroup\UserGroup;
@@ -25,10 +26,11 @@ class Author extends Identity
 {
     /**
      * Get the default/fall back locale the values should exist for
+     * (see LocalizedData trait)
      */
     public function getDefaultLocale(): ?string
     {
-        return $this->getSubmissionLocale();
+        return $this->getData('submissionLocale');
     }
 
     /**
@@ -79,26 +81,6 @@ public function setSubmissionId($submissionId)
         $this->setData('submissionId', $submissionId);
     }
 
-    /**
-     * Get submission locale.
-     *
-     * @return string
-     */
-    public function getSubmissionLocale()
-    {
-        return $this->getData('locale');
-    }
-
-    /**
-     * Set submission locale.
-     *
-     * @param string $locale
-     */
-    public function setSubmissionLocale($locale)
-    {
-        return $this->setData('locale', $locale);
-    }
-
     /**
      * Set the user group id
      *
diff --git a/classes/author/DAO.php b/classes/author/DAO.php
index 6998fa3c6e1..9a6585c2f5e 100644
--- a/classes/author/DAO.php
+++ b/classes/author/DAO.php
@@ -155,7 +155,7 @@ public function fromRow(object $row): Author
         $author = parent::fromRow($row);
 
         // Set the primary locale from the submission
-        $author->setData('locale', $row->submission_locale);
+        $author->setData('submissionLocale', $row->submission_locale);
 
         return $author;
     }
diff --git a/classes/submissionFile/Collector.php b/classes/submissionFile/Collector.php
index 8b2aa95bd81..b6325b141cc 100644
--- a/classes/submissionFile/Collector.php
+++ b/classes/submissionFile/Collector.php
@@ -1,4 +1,5 @@
 <?php
+
 /**
  * @file classes/submissionFile/Collector.php
  *
@@ -217,7 +218,7 @@ public function getQueryBuilder(): Builder
         $qb = DB::table($this->dao->table . ' as sf')
             ->join('submissions as s', 's.submission_id', '=', 'sf.submission_id')
             ->join('files as f', 'f.file_id', '=', 'sf.file_id')
-            ->select(['sf.*', 'f.*', 's.locale as locale']);
+            ->select(['sf.*', 'f.*', 's.locale as submission_locale']);
 
         if ($this->submissionIds !== null) {
             $qb->whereIn('sf.submission_id', $this->submissionIds);
diff --git a/classes/submissionFile/DAO.php b/classes/submissionFile/DAO.php
index 7cb16cd7cfb..d8360d6a997 100644
--- a/classes/submissionFile/DAO.php
+++ b/classes/submissionFile/DAO.php
@@ -163,7 +163,7 @@ public function getMany(Collector $query): LazyCollection
     public function fromRow(object $primaryRow): SubmissionFile
     {
         $submissionFile = parent::fromRow($primaryRow);
-        $submissionFile->setData('locale', $primaryRow->locale);
+        $submissionFile->setData('submissionLocale', $primaryRow->submission_locale);
         $submissionFile->setData('path', $primaryRow->path);
         $submissionFile->setData('mimetype', $primaryRow->mimetype);
 
diff --git a/classes/submissionFile/SubmissionFile.php b/classes/submissionFile/SubmissionFile.php
index 6c21d1e4db5..5939cdaf204 100644
--- a/classes/submissionFile/SubmissionFile.php
+++ b/classes/submissionFile/SubmissionFile.php
@@ -18,7 +18,6 @@
 
 use APP\facades\Repo;
 use PKP\facades\Locale;
-use PKP\i18n\LocaleMetadata;
 use PKP\services\PKPSchemaService;
 
 /**
@@ -55,40 +54,11 @@ class SubmissionFile extends \PKP\core\DataObject
 
     /**
      * Get the default/fall back locale the values should exist for
+     * (see LocalizedData trait)
      */
     public function getDefaultLocale(): ?string
     {
-        return $this->getData('locale');
-    }
-
-    /**
-     * Get the locale of the submission.
-     * This is not properly a property of the submission file
-     * (e.g. it won't be persisted to the DB with the update function)
-     * It helps solve submission locale requirement for file's multilingual metadata
-     *
-     * @deprecated 3.3.0.0
-     *
-     * @return string
-     */
-    public function getSubmissionLocale()
-    {
-        return $this->getData('locale');
-    }
-
-    /**
-     * Set the locale of the submission.
-     * This is not properly a property of the submission file
-     * (e.g. it won't be persisted to the DB with the update function)
-     * It helps solve submission locale requirement for file's multilingual metadata
-     *
-     * @deprecated 3.3.0.0
-     *
-     * @param string $submissionLocale
-     */
-    public function setSubmissionLocale($submissionLocale)
-    {
-        $this->setData('locale', $submissionLocale);
+        return $this->getData('submissionLocale');
     }
 
     /**
@@ -401,7 +371,7 @@ public function getLanguages(): array
     {
         $props = app()->get('schema')->getMultilingualProps(PKPSchemaService::SCHEMA_SUBMISSION_FILE);
         $locales = array_map(fn (string $prop): array => array_keys($this->getData($prop) ?? []), $props);
-        return collect([$this->getData('locale')])
+        return collect([$this->getData('submissionLocale')])
             ->concat($locales)
             ->flatten()
             ->filter()