Hi
Although there is bazarr, the subtitles are often not well synchronized. Downloading another version of the episode, even one of lower quality, may include the original or correct subtitles. I would like to be able to ask Sonarr to download a file and if it does not have subtitles in the required language, to download another one in the background until it finds it.
If the subtitles are included in the release title (name of the release/torrent/NZB), then you can use Custom formats to prefer those.
Otherwise, Sonarr can’t do anything about it.