Thank you for your answers !
SQLlitespy is the exact solution for me : csv table with author name and author_sort. And thank you for introducing me to SQLlitespy (shame on me

).
The Kovid python code outputs only author name without author_sort, and I am unable to expand it (shame on me

).
And I didn't know the beautiful JS+ (shame on me

) - but how to select author_sort ?