As I checked with my team, the Text to speech for Premiere Pro is currently unsupported Turkish Language Transcript in Premiere Pro, I would recommend you to try raising a request for your issue through this link so the team can work on adding the support for it in the future
IdeaNo status
TOPICS
Computer configuration
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Editing and playback
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FAQ
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Import and ingest
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Performance or Stability
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User experience or interface
AdChoices