Definitions
kanya: mix moistened matter by squeezing
rangana: Confer. Agree
Translation
Mixing (the sadza and the milk) comes after agreement.
Inspiration
Some people prefer mixing sadza and the side dish in one plate. In shared-plate eating, however, sadza and the side dish are generally served separately.
Application
Before doing things that are in the public interest, it is always better to consult and have their input. This way, certain unintended consequences are avoided.