Finally WORKS! But only on Kindle
I tried various combinations and none worked in both devices. But this last I kept the data in
"Set the list of words considered to be "articles" for sort strings" as follows
per_language_title_sort_articles = {'ron': ('Un\\s+', 'O\\s+', 'Ni\xc5\x9fte\\s+'), 'tur': ('Bir\\s+',),
'por': ('Q\\s+', 'Q\\s+', 'Qs\\s+', 'Qs\\s+', 'Qm\\s+', 'Qns\\s+', 'Qma\\s+', 'Qmas\\s+').......
default_language_for_title_sort = None
title_sort_articles =
'^(Q|Qhe|Qn)\\s+'
Replacing manually all the 'A' by 'Q' in 'por' language and also in title_sort_articles. That way I could "force" the kindle to sort titles including articles initials. That way I didn't need to change the "title's tweak" to 'strictly_alphabetic'.
Everything is ok now. Either to send to kindle as to save on disk, the file structure it stays the same:
{Author} FN LN - {Title} Article Name1 Name2
Dan Brown -
The Lost Symbol
again, thanks guys for all atention.
Best regards.