@MartyTX
I changed the language of some books into Spanish and actually WORKS! The books were arranged in alphabetical order on Kindle, considering the book "
The Lost Symbol" in
the category of T, and not in L.
BUT, there was a problem with the dictionary. I live in Brazil and how the book is in Spanish, Portuguese dictionary doesn't work

So I changed the books back to the Portuguese pt-br
With the field "author_sorting" and "authors" I can save on my HD in format
{authors} - {title} Dan Brown - The Lost Symbol
and send to Kindle (by Calibre) as
{author_sorting} - {title} Brown, Dan - The Lost Symbol
That way the author field appears on the Kindle in category
D, but the title remains in the category L, and not in the letter
T as I would like. This happens even if I changed the tweak's options in Calibre as 'library_order' or 'strictly_alphabetic'.
I already have the author field alphabetically organized and for me is already very good.
Anyway, thanks for everyone's help!