We've covered this same challenge at length over the years. In fact, we have a mini-homepage on the site just about making a Multi-Cultural PTO Work. One of our multi-cultural stories focused especially on Asian parents. Think I'll have to send Winnie Hu the link. :-)
Would love to have your ideas for making this work. Recent demographic trends make it more than clear that multi-cultural will be the norm throughout the country in the not-too-distant future.