Pseudolinguistic

Origin

- + pseudo + linguistic.

In use in sense (1.) from the early 20th century.

Full definition of pseudolinguistic

Adjective

1. pertaining to pseudo-linguistics. Deprecating of scholarship thought to purport to be linguistic but falling short of the necessary standardsrepresentatives of previous pseudolinguistic science, the philologists (The Rice institute pamphlets, Volume 2‎ (1915), p. 172)
2. quasilinguistic. Having some qualities similar to language, but not quite amounting to language in the narrow sense.
3. Relating to pseudolanguage.