North Irish Sign Language (NISL)
This video shows an Irish talking in NISL.
Northern Irish Sign Language which is a dialect of British Sign Language with strong connections to ASL. Irish Sign Language is a totally different language and is related to LSF. -- Fact from Jeff, a Deaf native NISL signer.
NISL is different from Irish Sign Language which is descended from LSF (French Sign Language). Irish SL is not similar to BSL.