From here : http://www.sphinx-doc.org/en/master/usage/advanced/intl.html

1 - Install sphinx-intl :
pip3 install sphinx-intl

2 - built gettext files :
make gettext

3 - Update po :
sphinx-intl update -p _build/gettext -l fr


Add a small txt file as a memo on how to build doc
Add a small txt file as a memo on how to build doc
