[2] There are two main dialects of TSL centered on two of the three major sign language schools in Taiwan: one in Taipei, the other in Tainan City.
There is a variant based in Taichung, but this sign language is essentially the same as the Tainan school.
TSL, like other sign languages, incorporates nonmanual markers with lexical, syntactic, discourse, and affective functions.
These include brow raising and furrowing, frowning, head shaking and nodding, and leaning and shifting the torso.
[4] The 2020 psychological-thriller The Silent Forest uses a large amount of the Taipei variant of TSL in the dialogue.