Hi Hannah,
thanks for the reply.
The multi-lingual product pages will be split nicely. That is on the cards.
The new site is meant for end users (direct to public) as an e-commerce site, and the client wants/ needs to keep the old domain for his wholesaler network. We can sacrifice its organic traffic.
So we don't want to 301 anything.
I just want to shift SHIFT the bulk of the organic traffic (which is end-user traffic) to the new site.
The pages will be very similar on both sites in terms of content.