Roblox Speech-to-Text works for one language but not another

Issue
Speech transcription works for one test account or language but produces no useful result for another.

Cause
The implementation assumes one locale, does not use a supported language configuration, or treats voice availability as universal.

Fix
Use the current Speech-to-Text API and supported language list, normalize locale selection, and provide a text or button fallback. Handle unavailable, denied, empty, and low-confidence results without blocking gameplay. Never use transcription as the only path for a required action.

Verify
Test supported languages with different account and device settings, then confirm unsupported or disabled voice returns a clear fallback rather than an error loop.

Official Roblox Speech-to-Text release recap