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SubDL has 3 polština subtitles for Devil. Each one is a separate file timed to a particular video release, so pick the entry whose release name is closest to your copy.
Match the release name to your video file. The polština files here cover releases such as Devil.2010.BrRip.Xvid 1337x-Noir-[ www.napisy.jcom.pl ], Devil.2010.720p.BRRip.XviD-TiMPE[ www.napisy.bplaced.net ], Devil.2010.BrRip.Xvid 1337x-Noir-[www.napisy.bplaced.net]. If none matches exactly, choose the one with the same source (WEB-DL, BluRay, HDTV) and resolution — those usually share the same timing.
Download the .srt and put it next to the video file with the same name, and most players load it automatically. In VLC use Subtitle - Add Subtitle File, in Plex and Jellyfin upload it from the item's subtitle menu, and in Stremio pick it from the subtitle button during playback.
A constant offset means the subtitle was timed to a different release: shift it with G and H in VLC, or J and K in MPV, until the first line matches. If the drift grows through the film, the frame rate differs and a file from the same release group is the better fix.
Yes. Some of the polština files here are marked HI (3 of 3), which means they also transcribe sound effects and identify who is speaking. The label shows in the list, so you can choose between an SDH file and a plain dialogue one.
No. Searching and downloading are free and need no account, and there is no daily download limit on ordinary use. An account is only needed to upload subtitles, use the API, or subscribe to a Pro plan.