subtitles; captions
On-screen text for films, TV, or video, either as a translation or for accessibility.
This movie has Japanese subtitles.
Display captions on the news program.
I added Japanese subtitles to this drama.
Partway through the movie, the subtitles stopped appearing.
He can watch English movies without subtitles.
Which do you prefer, the subtitled version or the dubbed version?
字幕 is the everyday Japanese word for on-screen subtitles, while キャプション is a loanword often used in broadcasting or technical contexts for the same thing.
字幕 is the general word for subtitles or captions, while スーパー refers specifically to text superimposed on a broadcast image.
字幕 shows translated text on screen while 吹き替え replaces the original audio with a dubbed voice track.
字幕 specifically means dialogue captions or translations, whereas テロップ is any superimposed on-screen text or graphic, such as a news headline.
Compound of 字 (character) and 幕 (curtain, screen), referring to text displayed on a screen.