Although the United Kingdom and the United States share English as the predominant oral language, British Sign Language is quite distinct from American Sign Language (ASL) - having only 31% signs identical, or 44% cognate. BSL is also distinct from Irish Sign Language (ISL) (ISG in the ISO system) which is more closely related to French Sign Language (LSF) and ASL.
Answer this question, making sure that the answer is supposed by the text: is there a difference between american and british sign language?
yes