diff --git a/backend/app/tasks/translate_and_synthesize.py b/backend/app/tasks/translate_and_synthesize.py
index 5d2ab7a..5f9be81 100644
--- a/backend/app/tasks/translate_and_synthesize.py
+++ b/backend/app/tasks/translate_and_synthesize.py
@@ -312,8 +312,15 @@ async def _async_translate_and_synthesize(job_id: str, languages: list[str] | No
         if job_doc["requested_outputs"]["audio_description_mp3"]:
             # Get TTS preferences from job
             tts_preferences = job_doc["requested_outputs"].get("tts_preferences", {})
+            # For retranslation, only regenerate TTS for the specific target languages —
+            # not all languages. Regenerating all is wasteful and triggers unwanted renders.
+            tts_outputs = (
+                {lang: updated_outputs[lang] for lang in target_languages if lang in updated_outputs}
+                if retranslate
+                else updated_outputs
+            )
             await _generate_tts_for_languages(
-                job_id, updated_outputs, db, source_language, tts_preferences, accessible_video_requested,
+                job_id, tts_outputs, db, source_language, tts_preferences, accessible_video_requested,
                 user_id=_cost_ctx["user_id"], cost_project_id=_cost_ctx["project_id"],
             )