At present, there are only few videos that have subtitles. But we plan on implementing it for more movies as well as TV shows in the future. In order to turn on subtitles you have to hover your mouse over the upper edge of the screen to access available subtitles. If the tab does not appear then there are no subtitles available for that particular title.
On mobile applications you will need first to start playing a movie or series then tab the screen to pause; on the left upper corner you'll find a "globe" icon, which you need to tab to have language and subtitle options displayed.