Home Misspellings How to spell autochtonous? Autochtonous or autochthonous? Which one is correct? by hersey December 27, 2016 Reading Time: 0min, 7sc + - 0 Autochtonous or Autochthonous Which one is correct? You can find the answer below. Incorrect Autochtonous Correct Autochthonous You can find more information about Autochthonous word here. Rate this post Correct spelling of autochtonousHow do you spell autochtonous?