Seek to know them. You may get more information from your local library or from an encyclopedia. Make sure that time, place, dress, transportation and duration of activity are clearly understood. Provide transportation where needed. Then call a few hours before the appointment to confirm plans.
Different cultures have different views of time.
Do not be surprised if they come late. Still respect their time and need to get home to study. You may wish to invite them to see your home as a quiet place they can retreat to be alone or to study. Welcome them with warmth and friendship. Learn to pronounce their real name.