Hi,
HikaShop have a feature for the "product canonical" and it can generate unique links for products.
In HikaMarket 1.4.2, we introduced the "vendor canonical" column in the database but for the moment, that feature is not supported. I wanted to be sure that all issues that users had with the product canonical were closed.
With the automatic generation of canonical or users who enter incorrect values for the product canonical, I still see various issues and I'm still not fan of it and I don't want to include such kind of feature if it generate more issues that it will solve problems.
So, that's why, for the moment the best is to use the vendor listing menu.
After that, you could use a SEF component in order to perform URL "translations" ; but the canonical support in HIkaShop is not really for my point of view to be integrated into HikaMarket for the vendor canonicals.
And I'm waiting for the new router system in Joomla which will provide new possibilities to create a more flexible routing system (in HikaShop and HikaMarket).
Regards,