Hello, good morning!

The table of Contents doesn't translate when exporting to utf-8 or ODT 
with pt_BR as the value for the LANGUAGE keyword. I believe the line 
below (6180, ox.el file):

("pt_BR" :html "Índice" :utf8 "Índice" :ascii "Indice")

should be something like:

("pt_BR" :html "Índice" :utf-8 "Índice" :ascii "Indice")

or:

("pt_BR" :default "Índice" :html "Índice" :ascii "Indice")

I'm using GNU Emacs 28.2, Org mode version 9.5.5.

Thank you.