A language switch, like the actual version switch, should allow to change from a translation to another.

I mean jumping from docs.python.org/3/ to docs.python.org/fr/3/ and so on.

It's already discussed in PEP 545.

I left out 2.7 because I don't know if the 2.7 docs have been or will be included.  

I am looking forward to this because I know someone who programs in Python and is also looking to learn 'professional' Japanese, including CS.  I myself might try the Spanish translations, if there are any.

@terry About Japanese translation, Inada Naoki is the coordinator, their repository is created (https://github.com/python/python-docs-ja) they just have to push now.

Once this language switch fully tested / implemented / released, it will be easy to add a language. Rules to add a language to the picker are described in PEP 545 (translation have to meet criterias like having a fully translated tutorial).

Spannish translation exist too, here https://github.com/PyAr/tutorial/commits/master but I don't remember if they contacted us about porting it to docs.python.org.

FYI I try to document which language is at which step of landing to d.p.o here: https://mdk.fr/blog/python-documentation-translation.html, coordinators are documented here: https://docs.python.org/devguide/experts.html#documentation-translations

FTR I'm currently testing the new switchers locally, I should be able to remove the "WIP" soon.

New changeset dff9b5f9d62aa0b23f8a255867d09d11890efd1b by Victor Stinner (Julien) in branch 'master':
bpo-31045: Language switch (#2652)
https://github.com/python/cpython/commit/dff9b5f9d62aa0b23f8a255867d09d11890efd1b

New changeset e93135dbb265e801c0000a19cd9c5428d57d1cf4 by Victor Stinner (Julien Palard) in branch '3.6':
bpo-31045: Language switch (#2652) (#3023)
https://github.com/python/cpython/commit/e93135dbb265e801c0000a19cd9c5428d57d1cf4

New changeset 245dafca85097dd8b84f02b01f39f5d32091754b by Victor Stinner (Julien Palard) in branch '2.7':
bpo-31045: Language switch (#2652) (#3024)
https://github.com/python/cpython/commit/245dafca85097dd8b84f02b01f39f5d32091754b

Even if changes are merged, I prefer to wait until the doc at docs.python.org is to date before closing the issue.

For future reference, please make sure to include current release managers on proposed changes like this since doc building and distribution is part of the release process.

New changeset 1b141b9553424971639bde281feb1d4e4e586dbe by larryhastings (Julien Palard) in branch '3.5':
Doc: Backport language switcher (bpo-33700, bpo-31045) (#8048)
https://github.com/python/cpython/commit/1b141b9553424971639bde281feb1d4e4e586dbe