Amazonians can bid for .amazonia should they want to.

There is absolutely no reason why they should be given rights on .amazon, a foreign word that doesn't exist in their own language.

Note that Amazonia is one (of multiple) localization of Amazon - it's just as foreign.

Note also that it is a well-established standard for TLDs to use English - e.g. .fi instead of .su.

Counter examples abound, since as of August 2018 there were 59 approved internationalized country code top-level domains, 47+ of them actually used (Wikipedia)

.рф (Russia) 900000+ domains, .台灣 (Taiwan) 500000+ domains, .中国 (China) 200000+ domains, etc.

See also .tp (Timor Português), .cs (Československo), .dd (Deutsche Demokratische Republik), .de (Deutschland), .rs (Republika Srbija), etc for examples using the latin alphabet.

True - it would be more accurate to say that both English and non-English TLDs are common.

Amazon the company should logically have Amazon.com, since that's literally what that stands for.