I have been using Addic7ed [0] in cases where I need subtitles. Any new shows/series get their subtitles uploaded extremely fast, and as I understand translations also happen there (when already not available from a streaming service).

On the other hand I was using VLSub, a VLC addon, which downloads subtitles automagically. But now I see it used opensubtitles :(

[0] https://www.addic7ed.com/

[1] https://addons.videolan.org/p/1154045/