Not so long ago, The Not So Short Introduction to LaTeX was at version 4.26, and the only french version available (at least, with the sources) was version 3.20. Hence I translated the 4.26, starting from the changes brought by version 3.21 upstream and making my way up version by version. As of latest versions, Manuel Pégourié-Gonnard and I teamed up for translating the new versions.
From then on, the translation follows the rythm of the upstream release. The latest version of the translation is: v5.01fr-0.
First of all, the Github link for the development version:
An official compilation can be found on the CTAN project website:
Then, the compiled versions, normally as up-to-date as the latest tag of the "french" version.