Hi,
1 - None
The name is generated by the HikaShop checkout system but is based on the block provided by HikaMarket.
So you have to create that new translation but please prefer to follow my previous instructions which is far better.
2 - There is no best practice workflow for multi-vendor shop ; it is a classical workflow..
In any case, for any kind of shop, just have the "terms & condition" alone in a step is not very friendly for your customers.
It's generally "best" to let that checkbox on the last step to have it just before the "finish button".
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.