Complex sentence: A prevalent culture in the region is that, for welcoming an incoming guest, hosts stand up and receive him i.e. the guest need not have to stand up and welcome an inmate in inmate's home.
Split into simpler sentences: A prevalent culture in the region is that, for welcoming an incoming guest, hosts stand up and receive him. Another culture is that a guest need not have to welcome an inmate in the inmate's home.