Enable syncing of zh-tw and zh-hk for MediaWiki

I actually discussed with Liangent before coming here (originally I had wanted to simply re-enable zh-tw and zh-hk fully, but they pointed out that this would completely mess up the "translated" statistics and cause maintenance issues). As Jdforrester quoted, there are some differences, and probably relatively more numerous of them in interface messages, since there are many neologisms in technical terminology. I think the question is whether the technical difficulties are a bigger issue than a UI that doesn't feel fully localised (to be clear, it's basically completely understandable, just imperfect).

Incidentally, while I don't use zh-hans / zh-cn / zh-sg, I would guess that this is a smaller issue on their side, as I think there is only a single Simplified Chinese translation for most software, unlike the case for Taiwan and Hong Kong.

wctaiwan (talk)‎

Per phab:T51898, you're no longer possible to translate under /zh-tw, however, we still open /zh-hk, that's actually never disabled.

Liuxinyu970226 (talk)‎