The last papers I read on the subject clearly stated that it appears to be a real language given the word and character distributions but it can only be a tonal

The last papers I read on the subject clearly stated that it appears to be a real language given the word and character distributions but it can only be a tonal language, like Sino-Tibetan or Meso-American. Which in my opinion makes the old Marco Polo delegate theories the most probable, but all through the lenses of European culture.