To choose the language of the subtitles, click View › Subtitles › Select Text Subtitles, then select the subtitles language (DVD) or subtitle file (AVI etc.) you want to display.
To disable the display of subtitles, click View › Subtitles › None.
By default, GNOME Videos chooses the same language for the subtitles that you use on your computer.
GNOME Videos automatically loads and displays subtitles if the file that contains them has the same name as the video file. It supports the following subtitle file extensions: srt, asc, txt, sub, smi, or ssa.