I think it's rude,yes,they are in their own home ,but have invited you there so surely it would be common courtesy to speak so you could understand the conversation,afterall they could be slating you to hell.
__________________
RIP Pyramid, Andyman ,Kerry and Lex xx
https://www.facebook.com/JamesBulgerMT/?fref=photo
"If slaughterhouses had glass walls, most people would be vegetarian"