Jokes that I would understand

That day at the Patong apartment, there were not much on TV. There were cable but nothing's much on show. Mainly news channels, sports channels, two movie channels but nothing was in English. Until finally one morning, I flicked the TV's remote control and there was this scene, I think it was one of those Fast & Furious movies, the scene was on a group of people and they were singing at a church's service. I said-- Finally! We have something in English! However, right after that scene, the movie went back to speaking Thai...... ha ha ha.They don't dub singing scenes I guess. If that's the case then an entire musical movie would be in English when in Thailand (?)