On a complete tangent - because after reading the link I remain clueless about what services/things varlink wants to connect (and also: why are the error messages not human readable by default?) - I find myself wondering if the time has yet come for us to start writing our Human-Machine interfaces in Lojban[1]?

[1] https://en.wikipedia.org/wiki/Lojban and https://mw.lojban.org/papri/Lojban#Learning_Lojban