Are there specific dharamshalas for Odia, Bengali, or South Indian families?

Yes. The Gaya pilgrimage site has historically attracted regional community-specific infrastructure. There are dharamshalas managed by Odia trusts, Bengali societies, Tamil Nadu pilgrimage bodies, and Marwari community organizations. These offer regional language support, familiar food, and a community of co-pilgrims from your region. Ask your pandit ji or contact your regional pilgrimage association for the appropriate property.