The only option for subtitles in the original language before was Subtitles for the Deaf and Hard of Hearing (SDH/CC). These subtitles include dialogue but also audio cues such as

Netflix is rolling out a new way to watch your favorite shows and movies if you’re a viewer who keeps the subtitles on at the bottom of your screen.

The new feature isn’t universal—it’s apparently going to roll out to other Netflix originals, so anything licensed will have to just live with the closed captions subtitles. But for the shows that support it,