This reads like your looking for some sort of AI solution to outbound emails, particularly as I assume your looking for the email script to be customised to the business type. There probably is software out there that tries to engage buyers with High value, high probability of returns, Vehicles, Cruises etc , but I wouldn't put domain selling in that territory.
I like the thought though. You buy some domains, enter them into the interface and Bingo, the only thing you see is your outbound email folder has hundreds or even thousands of new sent messages. You got to remember most domainers are desperate for cash and by association tight as a skinflint when paying for anything. So I doubt anyone is being driven to develop such a Intelligent tool.
If your going to outbound, stick to the proven method of manual and selective outbound. If language is your problem, just make sure somebody else Proof reads your outbound emails first