jbo kem bau ske lujvo

x₁ is the linguistic science/study of the Lojban/Lojbanic language.

Must be in the field of linguistics (bauske); this is a more specific term than jbobauske and jboske.

jbovlaste

In notes:

jbobauske: x₁=s₁ is the science/study of the Lojban/Lojbanic language based on methodology x₂=s₃.
jboske: x₁=s₁ is the science/study of Lojbanic language/culture based on methodology x₂=s₃; x₁ is a 'Lojbanology'.