It is always necessary to clarify as much as possible how your system (or not system:-)) works I will think.
I used to have so many non English speakers I created a guide to my home and expectations and it his helped as I spell how much I want negotiation out.
So mostly I haven’t had this problem.
At the bottom line also I tell em if they don’t like a host, the rules, the work then leave for heavens sake. It should simply be this isn’t working I’m out of here or from the host POV hey this isn’t working I’ll help you leave.
I have heard woofers talk about some ghastly situations and cannot think why they stayed. Similarly I have at least once negotiated the early departure of someone who I just couldn’t help to understand what I thought a fair deal.