RE10: Lots of undefined control sequences when using Arabic Babel

[outlook user]

I try to create MWE for the sake of exposing an issue, to avoid disclosing all my document. Problem is that I can't know what to isolate precisely to re-create my issue in the MWE. So, I put what I guess makes the issue (because error appears). But when I see that it's not the root cause, I search further into my document to isolate further problems, so I add it into the MWE. Objective being to redact problematic code of my document, here to write Arabic

________________________________________
De : David Carlisle <d.p.carlisle at gmail.com>
Envoyé : lundi 13 mai 2024 9:50
À : outlook user <RACP at outlook.fr>
Cc : texhax at tug.org <texhax at tug.org>
Objet : Re: RE8: Lots of undefined control sequences when using Arabic Babel
 


On Mon, 13 May 2024 at 08:39, outlook user <RACP at outlook.fr> wrote:

\usepackage[T1]{fontenc} % No effect before `babelfont`. Probably because it reconfigures things right after it


You keep changing the example. Never use T1 encoding with lualatex or with arabic. It is an 8 bit  encoding for Latin script with (pdf)latex.
So unsuitable for Unicode fonts and  unsuitable for Arabic. The examples in the babel manual and the examples we posted didn't have this.

David