Charlie Chaplin Modern Times

I liked how Charlie Chaplin didn't make a talking film because if he would of then his last film wouldn't have been as great. I like how he predicted we were going to have television and cameras. I don't understand why Charlie Chaplin kept on going back to jail. Why did the boss have Chaplin's voice, couldn't he have just used his own voice. How did the machine make Chaplin crazy? I understand it would take away their job but not make them insane. My favorite moment in the movie is when he is singing. I wonder what language he was singing in. Chaplin was lucky that the warden of the jail gave him a signature that let him get any job. Even with the signature, he couldn't maintain the job because he didn't know what to do and would always get fired. Where did Chaplin and his girlfriend end up at the end.