I came across a new word a few days ago, seemed to be in common use from the (spoken) context but not yet documented - dysethnicsia - to describe the mixing up of people from different ethnic groups, or the lumping together of a range of ethnicities due to their similar appearance or similar sounding names of their nations, obviously inspired by dyslexia and dyspraxia..
Seems to fill a gap as can't think of another single English word that could take its place.. Wonder if anyone has seen it in print?