Sorry for being so slow to sponsor.
While trying to build, I get this error:
mv: will not overwrite just-created
'debian/tmp/usr/share/doc/python3-grammalecte/README.txt' with
'debian/tmp/usr/lib/python3.9/dist-packages/grammalecte/README.txt'
This happens because you are trying to move multiple files to the same path:
debian/tmp/usr/lib/python3.10/dist-packages/grammalecte/README.txt
debian/tmp/usr/lib/python3.9/dist-packages/grammalecte/README.txt
-> debian/tmp/usr/lib/python3.9/dist-packages/grammalecte/README.txt
I'd suggest singling out one python interpreter with `py3versions -d`?