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.