sublinguistic
/ˌsʌblɪŋˈɡwɪstɪk/adjective
1Of, relating to, or characteristic of a sublanguage or sublanguages; characterized by the use of a sublanguage.
2Not fully linguistic; relating to or expressed in a level below that of language; nonverbal.
Origin
Early 20th century; earliest use found in Journal of the Royal Anthropological Institute. From sub- + linguistic.