Then I found Shoko and was blown away. I found out that not only could I use it to fix the metadata problem, but I could even get it to organize and rename my entire collection. I spent a lot of time configuring this renaming (even making my own fork of ShokoServer because I didn't like their invalid character replacements) and then, after making sure it worked for a few examples, threw my whole library into it. Source: over 1 year ago

Might wanna look into shoko server and shokofin. Source: over 1 year ago

I've had no issues here with subtitles. Metadata can be a bit janky though, so I use Shoko and the Shokofin plugin to help: Https://shokoanime.com/. Source: over 1 year ago

The last time I was looking into this, I came across a couple of projects that are supposed to help you organize your anime library to deal with this kind of stuff, the main current one being Shoko. Some past discussions: [1], [2]. Source: over 1 year ago

The only way I was able to work around this was by setting up a Shoko server, which fixed all those issues for the most part, although I still have some issues on a few shows. I actually also use Shoko as my primary Plex agent now for my anime libraries and it works pretty well. Source: over 1 year ago

Opensubtitles is another good option, for many languages. Source: about 1 year ago