From Pluralpedia, the collaborative plurality dictionary
disparethnic (n., adj.)
Applies toheadmates
CoinerDödstöld Package

A disparenthnic is a system member whose race, culture, and/or ethnicity is different than the body's.

This term is made with the thought in mind to have a term to explain some system member's experiences but not as a way to let white-bodied systems talk over people of color on POC/BIPOC issues and hardships. It also shouldn't be used to participate in closed cultures that the body isn't apart of.