diff --git a/classes/submission/maps/Schema.php b/classes/submission/maps/Schema.php
index 0ba29a17e1e..c02e101eae9 100644
--- a/classes/submission/maps/Schema.php
+++ b/classes/submission/maps/Schema.php
@@ -358,6 +358,11 @@ protected function mapByProperties(array $props, Submission $submission, bool|Co
                 case 'editorAssigned':
                     $output[$prop] = $this->getPropertyStageAssignments($this->stageAssignments);
                     break;
+                case 'metadataLocales':
+                    $output[$prop] = collect($this->context->getSupportedSubmissionMetadataLocaleNames() + $submission->getPublicationLanguageNames())
+                        ->sortKeys()
+                        ->toArray();
+                    break;
                 case 'publications':
                     $output[$prop] = Repo::publication()->getSchemaMap($submission, $this->userGroups, $this->genres)
                         ->summarizeMany($submission->getData('publications'), $anonymize)->values();
diff --git a/schemas/submission.json b/schemas/submission.json
index eaae69ee174..ea9cae2b9fa 100644
--- a/schemas/submission.json
+++ b/schemas/submission.json
@@ -77,6 +77,14 @@
 				"regex:/^([A-Za-z]{2,4})(?<sc>[_-]([A-Za-z]{4,5}|[0-9]{4}))?([_-]([A-Za-z]{2}|[0-9]{3}))?(@[a-z]{2,30}(?&sc)?)?$/"
 			]
 		},
+		"metadataLocales": {
+			"type": "array",
+			"description": "The list of metadata locales in the form [locale code => locale name translated in UI locale].",
+			"readOnly": true,
+			"items": {
+				"type": "string"
+			}
+		},
 		"publications": {
 			"type": "array",
 			"description": "A list of publications that have been created for this submission.",