ASL has been demonstrated to influence the vocabulary and grammar of MSL; for example, because the original BANZSL two-handed manual alphabet is no longer used in the Maritimes and has been replaced by the one-handed American manual alphabet, lexicalized signs are developed from one-handed fingerspelling.
ASL's influence on MSL is evident in changes like the replacement of a two-handed manual alphabet with a one-handed alternative, leading to the development of new signs through finger spelling.