jansu -jas- gismu

x₁ is a diplomat/consul representing polity x₂ in/at negotiation x₃ for function/purpose x₄.

(for) x₃ polity, (use tu'a); also ambassador (= raljansu, trujansu). See also jecta, krati.

jbovlaste

In notes:

jecta: x₁ is a polity/state governing territory/domain x₂; [government/territory relationship].
krati: x₁ represents/is an agent/proxy/stands-in for [absent] x₂ in matter(s)/function(s) x₃.
gugyka'i: k₁ is a diplomat/ambassador representing country k₂=g₁ in matter(s)/function(s) k₃.
jasybriju: b₁ is an embassy/consulate of j₂ at b₃.