Other mistake: It is established that Drs. Quest and Hartman speak the Po-Ho's language, but when they are captured, Dr. Hartman is translating to Dr. Quest how the Po-Hos are going to torture them.
Attack of the Tree People - S1-E19
Other mistake: The captain of the ship that picks up Race and Dr. Quest talks with a German (and sometimes French) accent but the commands he gives are in Dutch, like "Volle kracht vooruit" and "Pik de drenkelingen op" (the Dutch accent is very different from the German accent, as is Dutch from German).
