1 in notes

rukybau lujvo

r₁=b₁ is the Russian language used by b₂ to express/communicate b₃ (si'o/du'u, not quote).

Cf. rusko, bangu, banru'usu.

• jbovlaste

In notes:

banru'usu

x₁ is the language with ISO 639-3 code “rus” (Russian).