When they speak their own language with subtitles, it's ok. But it's weird when for example, in some American movies, foreigners speak to each other in English with an accent even when they are alone!
Willie Marfeo to Henry Tameleo:
1) "You people want a loaf of bread and you throw the crumbs back. Well, fuck you. I ain't closing down."
2) "Get out of here, old man. Go tell Raymond to go shit in his hat. We're not giving you anything."
| 
