Detachment is useful for English practice if you can already follow natural conversations. The vocabulary is not overly technical, though it includes enough variety to make the practice meaningful. At an intermediate level, the main story should be easy enough to follow. With the dialogue moving at a natural rhythm, viewers should catch most of it, although a few moments may still be challenging. The community has given Detachment an English difficulty rating of 6.4/10, so a B2/C1 level is recommended to learn from it effectively and enjoy the content.