There is a discussion elsewhere about whether it is time to start formalizing translation efforts for the python docs (Sphinx supports it).  Unfortunately I don't remember where I saw it (probably another issue in the tracker.

I can see your argument about turtle being special in this regard.  There's no guarantee a patch would be accepted, though, so before you do much work on it I'd recommend posting to python-ideas about it.

Regardless of that, it would be a new feature and so can only go into 3.6, unless you can get some consensus for this being another exception to that rule like Idle is :)