@ Anthony Cooper
The issue is that file encoding that Excel is applying to the file when the CSV is being exported. My suggestion, use either Google Spreadsheet or LibreOffice Calc to create the CSV file. Make sure to export the file with UTF8 encoding. If Excel has that option (I do not know) then you could try changing the file encoding to UTF8. Working with Excel to create CSV files can be hit or miss due to the system config of the PC that it is installed on. Whereas Google Spreadsheet or LibreOffice Calc “just work” as long as you set the encoding to UTF8.
Hope that helps, let me know.