Yes, modern dubbing studios use "lip-sync" technology. However, English words often have shorter syllables than Tamil, so there will be minor mismatches, but nothing distracting.
The success of Hollywood movies in Tamil Nadu heavily relies on the voice actors. The Tamil dubbed version of this film benefits from voice talent that matches the gravelly intensity of Colin Farrell or the seasoned wisdom of Ed Harris, ensuring the serious tone of the movie remains intact. Where to Watch "The Way Back" Tamil Dubbed Legally the way back tamil dubbed
No, it is a fictional story, though Affleck drew from his real-life rehab experiences to inform the role. Yes, modern dubbing studios use "lip-sync" technology