Lip-Sync & Voice Quality Fix

I have an almost-finished video-localisation app: it already turns any user video into multiple languages by chaining speech-to-text, translation and text-to-speech. The last hurdle is the “believability” of the final clip... (Budget: ₹1500 - ₹12500 INR, Jobs: Audio Processing, Audio Production, Audio Services, Machine Learning (ML), Python, Sound Design, Voice Over, Voice Talent)