Amazonian is meant to represent indigenous groups from the Amazon region, like the Tupi or Marajoara.

引用自 SeelingCat：

Amazonian is meant to represent indigenous groups from the Amazon region, like the Tupi or Marajoara.

But , tupi-guarani was tribes of peoples who inhabited most of brazil's coastline in the sixteenth century, and that poin made even more erroneous then before.

Same reason as why Cree isn't colonial and Scots isn't celtic