Nyaa. si has non english dubs of some show. The tags aren’t always accurate so it might say English translated and actually include English and other dubs/subs

IMHO you have to download the whole media again, only the dub is very difficult that would match the video seamlessly - even subs often desync because in that particular zone they cut 2 seconds from a scene or they are playing the media at a wrong frame rate (now less common but with analog media it happened a lot)

Depends on the language and the content itself. I’m hunting one where all the torrents are from 2012, so… Gave up, and buying the actual media. 😂