Subdownloader is an app that lets you download subtitles for any movie or TV series directly to your computer without opening your web browser.
Subdownloader lets you do two types of searches. Undoubtedly the more interesting one is to search by file, which lets you select a file for which the program will try to find subtitles. If you don't have any luck with this method, you can always use the traditional one.
You can filter the results by language, so you won't have any trouble finding the track you need.
If you can't find your subtitles using Subdownloader but have found them elsewhere, you can also help other users by uploading the file to the application.