To set the caption or subtitle language for a selected video, on the Play menu, point to Captions and Subtitles, and then click the appropriate language or other option.
A bullet appears next to the language or option that is currently selected.
To set the default caption or subtitle language for all videos, on the Play menu, point to Captions and Subtitles, and then click Defaults. In Captions and Subtitles, click the language in which you want the captions and subtitles to appear.