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

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,

Netflix today announced that it is introducing a new subtitle option that only shows subtitles for spoken dialogue, aimed at those who don't