Sign Language: Portuguese Sign Language

Subclassification references
Comments on subclassification

Although the origin of Finnish Sign Language is in the early Swedish Sign Language, the two languages developed in their own directions. Today, 160 years later, Finnish Sign Language and Swedish Sign Language are totally different languages. It has been estimated that already at the beginning of the 20th century the congruence in the lexicons of Finnish Sign Language and Swedish Sign Language had fallen to 71–73 percent. In 2000 congruence was no more than 42% ( Ritva Takkinen and Tommi Jantunen and Outi Ahonen 2015: 254 , Johanna Mesch 2006 ). Portuguese Sign Language [port1277] descends from 19th century Swedish Sign language ( Woll, Bencie and Sutton-Spence, R. and Elton, F. 2001 ):29. Finland-Swedish Sign Language [finl1235] is also a member of this family as shown by historical and lexical evidence ( Hoyer, Karin 2005 , Kristín Lena Thorvaldsdóttir and Elísa Gudrún Brynjólfsdóttir 2016: 812 ). Finnish Sign Language [finn1310] includes Eritrean Sign Language ( Moges, Rezenet Tsegay 2015 , Moges, Rezenet Tsegay 2015 ).

AES status:
Campbell, Lyle and Lee, Nala Huiying and Okura, Eve and Simpson, Sean and Ueki, Kaori 2022
Portuguese Sign Language (7358-psr) = Threatened (20 percent certain, based on the evidence available)

(see Lewis 2009)

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