1. History

Taiwan Sign Language (TSL) is a natural language developed and used by the deaf in Táiwān. According to the 2013 report of the Ministry of the Interior, Táiwān, there are about 13,396 citizens with hearing mechanism disability in Táiwān (http://www.moi.gov.tw/stat/year.aspx/). Smith (2005) reported that TSL is used by approximately 30,000 deaf people residing in Táiwān. However, as yet there is no official census of the population of TSL signers.

There are two …