Could we provide the user the right language more automatically?

[JulienPalard]

I mean, when a french browser hits docs.python.org/ it could be redirected to docs.python.org/fr/ in a clean way.

I'm sure some people prefer reading the english version anway, so we need to find a smart way of doing it, a way such that nobody can complain about it.

[JulienPalard]

cc @christopheNan