How to translate ghost, phantom, spirit
Beyond the usual limitation of originally being designed as flavoring for military sci-fi stories, Mando'a was not being designed for tales of the supernatural or for a people who believe that the soul could be stuck in the mortal plane. Nonetheless, there are some options to pick from
runi: soul
runi ures baar: soul without a body
runi meg yaimpa: soul who returns
kaden runi: angry soul; poltergeist
trikar'la runi: sad soul; banshee
hodayc runi: cunning soul; mischievous soul
echoy'la runi: mourning ghost
runi teh tome'tayle: soul from memories; residual ghost
prudii: shadow
shev'la adat: silent person
dar'adat: former person
oya'la kyr'ad: living corpse; zombie