Oh @Ivan66, I'm sorry. They will be gone soon enough, you won't do it again, and it will just be a memory. Just be careful with your review response in case they write one (they speak no English...). Should they slam you, don't rise as your response will be more important than their review. I have seen time and again hosts being longwinded, aggressive etc in their response which will sit publicly on their review page for ever. So, IF they write a bad review, you can respond after a day of calming down in a brief way, polite, professional. This shows to future guests thay you are calm in a storm and can handle yourself well.
''I am sorry that you didn't have a good time but perhaps next time, you might find a hotel will better cater for your needs.''
You can do better than that, but you get the general idea. In the review to them, mention the booking for parents, no english, ''better suited to hotel'' etc, but don't be nasty as hosts will get it regardless. Nasty tends to backfire!
All the best.