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of MSL; for example, because the original BANZSL two-handed manual alphabet is no longer used in the Maritimes and has been replaced by the one-handed American manual alphabet, lexicalized signs are developed from one-handed fingerspelling.
The use of ASL has led to changes in the vocabulary and grammar of Sign Language (MSL), such as the shift from a two-handed manual alphabet in the Maritimes to a one-handed American manual alphabet. This has resulted in the creation of new lexicalized signs based on finger spelling.