See example: https://meta.wikimedia.org/w/index.php?title=Special:Translate&group=page-Wikipedia+15&action=page&filter=&language=zh-hans >> "Translate in zh please."
But https://meta.wikimedia.org/wiki/Wikipedia_15/zh-hans is still exists.
How?
That's how - https://meta.wikimedia.org/w/index.php?title=Translations:Wikipedia_15/Page_display_title/zh-hans&action=edit
Etc., item by item.