From what I recall, subtitles were indeed tremendously helpful when I was learning English - English subtitles only, though. Being able to read along took the s

From what I recall, subtitles were indeed tremendously helpful when I was learning English - English subtitles only, though. Being able to read along took the stress out of having to cope with enunciation and understanding meaning at the same time. Translated subtitles on the other hand were just a distraction. My brain would end up reading them and start ignoring the English, rather than make any connections. So I don't think trying to have two languages active concurrently and constantly translating forth and back works well. However, having audio and text in the same language active concurrently helps with instilling an audio representation of the language in your head, which is crucial in e.g. improving reading speed, because you really need to be able to actually speak in your head instead of working with abstract symbols.