If you have a movie in English and a separate dubbing file, you can merge them into one dual-audio MKV using free software like MKVToolNix . Risks of Unofficial Download Sites

Platforms like Netflix , Disney+ , Amazon Prime Video , and HBO Max are the primary sources for Hollywood movies with multi-language audio tracks. These services allow "offline viewing" through their official apps, which essentially downloads a protected version of the movie to your device.

For older Hollywood classics, websites like The Public Domain Review or PublicDomainMovie.net offer free, legal downloads. Understanding MKV & Dual Audio Technology

You can purchase and download Hollywood movies from the Google Play Store or Apple TV . These often come with multiple audio options and provide high-bitrate files.