Below is a screenshot where data, including Chinese and Arabic characters, will be imported into the Group "Customers":

Uploading Files Containing Foreign Language Characters:
If you upload a file containing foreign characters into a JangoMail Group, make sure the file is saved as a Unicode file, and NOT a UTF-8 encoded file. The below image shows how to save a file as a Unicode file in Windows Notepad (click image to see full size):

API/Web Service Reference:
The Group Import methods, ImportGroupMembersFromData and ImportGroupMembersFromFile have also been enhanced to support foreign language characters.