My friend's told me about this deal - I've always been paying north of 90 bucks for a Super Robot Wars fix before this so this price is news to me. DLC pack is also on sale at half price (10 AUD).
HK version has English. I've been able to use NAB debit card to pay for it but my friend's Macquarie debit wasn't. However, you can buy a pre-paid card on Nintendo HK eshop with Macquarie bank.
https://store.nintendo.com.hk/games/prepaidcard
or if that doesn't work - play-asia.com also sells HK eshop card.
Just use google translate and it's quite straight forward.
Creating a HK Nintendo account is required - but again, it's straight forward. Or you can use any of your spare account and change the region in account setting to HK.
Super Robot Wars V is often regarded as better than T/X - I've only started but the story already seems better.
My first deal :) let me know if I'm missing something and I'll update the post.
Thank you op, being eyeing off this series forever on play-asia but could never justify the cost :)
Anz debit card managed to work for me on PC as well