I'm planning on making the new design degrade gracefully all the way down to IE8. We still have enough users still using this browser to justify the extra work.

One problem that @dstufft has just raised is translation, as we are using l20n.js - which is great (and has a lot of cool features) but only supports evergreen browsers. (Note - I couldn't actually find the reference for supported browsers - @dstufft are you able to point me int he right direction?)

Given that the majority of our legacy IE users are not located in the English speaking world, this is a bit of a problem.

@dstufft and I discussed a few options:

1. Using gettext instead
2. Porting l20n.js to Python
3. Helping l20n.js support older browsers

After a tiny bit of research, it looks like there is already a Python port available at https://github.com/l20n/python-l20n

Advice and feedback on this issue is warmly welcomed. We'd particularly like to hear from any developers who have experience rolling out l20n to a site of this scale.