Great!

Can you take a look at:

https://ask.stg.fedoraproject.org/zh/questions/

and confirm that the locale looks ok there before I enable it in the main site? I want to make sure I got the configuration correct.

The locale is correct. But the word on the top left corner is better to be 'Simplified Chinese', and the url zh_cn instead of zh in order to avoid confusion.

ok. I have made those adjustments to the stg site... can you check it again?

If all looks well we can enable the same in production. :)

Looks good. Please enable it in production. Thanks :)

Done. ;)

Please let us know if you need anything further.