sentence: Sign languages can develop from the same source.
sentences_before: However, sign languages are not totally independent from each other.
sentences_after: For example, ASL, LSM, and LSQ all developed from Old French Sign Language. They are part of the same language family. Sign languages can be similar to each other. BSL, Auslan, and NZSL are very much alike. Linguists sometimes talk about them as if they are one language.
concept_name: sign language
headings: Sign language Different sign languages
categories: Disability Language-related lists