Enhancement: Added multilingual support and UI improvements

[nandv2007]

Changes Made

• Added language selection for multilingual TTS
• Integrated translation before speech generation
• Added speed control slider
• Improved audio download UX

Impact

Enhances usability by enabling users to generate speech in multiple languages and control playback features.

Future Scope

• Emotion-based voice synthesis
• Voice cloning

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[nandv2007]

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