0004 - Videos subtitle
For the videos that appear in the lessons, you have the option to choose subtitles in various languages. This can be helpful, for example, if you are watching the course on public transport during your commute, or want to avoid disturbing your coworkers with the sound.
You will find the icon for subtitles in the bottom right corner of the video, and you can even deactivate this option if you prefer.
0004.01 - Subtitle icon at the bottom of the videos, and the language option.
0004.02 - Languages menu, which displays the currently available subtitle languages.