Is sign language universal?

No form of sign language is universal.  Different sign languages are used around the world in different countries or regions.  Langue des signes québécoise is different than Langue des signes française (LSF), as American Sign Language (ASL) is different than British Sign Language (BSL).  A Canadian using ASL will not necessarily understand a BSL user.

For more information (French only) :

Fiche d'information : La LSQ