Troubleshoot Translation and Spoken-Caption Failures

Diagnose missing language, provider credentials, glossary, TTS voice, queue, and player problems.

Written By 4ALL.LIVE

Last updated About 1 month ago

Restore text translation or spoken captions while proving whether source captions, translation, or TTS is the failing stage.

Best for: Producers, accessibility operators, and support.

Before you start

Translation/TTS requires enabled languages, plan entitlements, valid provider configuration, and available usage/wallet capacity.

  • Use a non-production reproduction when possible.
  • Record current configuration before changes.
  • Keep an independent confidence monitor and fallback.
  • Confirm source captions are healthy.
  • Record source/target languages, provider, glossary, voice, output, and first failure time.
  • Use a private viewer for testing.

Troubleshooting steps

  1. Verify the target language is enabled on the event and selected by the viewer/output.
  2. Confirm source finals arrive; translation cannot recover absent source text.
  3. Check organization-managed or BYOK provider credentials, region, quota, billing, and supported language pair.
  4. Temporarily test without a custom glossary to isolate malformed terms or incompatible provider behavior.
  5. Compare translation status/metadata and sequence with source captions.
  6. For spoken captions, verify TTS entitlement, voice availability, browser autoplay/audio output, volume, and queue state.
  7. Check whether the target language works in text but fails in TTS; if so, isolate voice/provider support.
  8. Restore glossary/voice one change at a time and validate terminology, latency, and privacy.

After the fix: The issue is isolated to event configuration, provider translation, glossary processing, TTS synthesis, or viewer playback.

Confirm the fix

  • Source captions are healthy.
  • Target text updates with sequence.
  • Spoken output uses correct voice/device.
  • Provider quota/usage state is documented.

If the problem continues

  • Language absent: enable it and republish/share as required.
  • 401/403: repair credential/access; never paste key into support notes.
  • 429/quota: use approved provider/funding fallback.
  • Text works/audio fails: allow autoplay and select correct output device.

Escalation and safety

Important: Translated and synthesized content can be inaccurate. Keep human review for safety-critical, legal, medical, or public-emergency material.

  • Configure Translation Languages and Providers
  • Configure Spoken Captions and TTS Voices