In my practice I regularly have participants from different cultures and countries.  I try to touch base with them before the mediation to see if they have nay special ways, rituals, etc that they approach addressing differences.  I then try to incorporate these needs into the session being mindful of others in the session that may not be aware of their needs.

I think any mediation practitioner needs continuing education on different cultural approaches to mediation.  Some ideas from other cultures can be eventually incorporated into our styles and vice versa, making all approaches more effective.