My parents visited me last year. I printed several cards for them: English on front to show to get help, Chinese on back for themselves read. Question on cards could be:"Where is washroom?", "I will take Flight*** to Ottawa, could you tell me where to departure?", "I do not know English, could you show me?"..
But actually they did not use them at all. They talked with some people from China on CP30 and go with him in the airport.