Excel does not automatically encode "UTF-8 characters". Because the Ten Thousand Coffees platform is web-based and allows for special characters (such as Turkish or Mandarin characters), the data export will replace accents with symbols unless opened correctly.
To open this in Excel without any character issues, you can open a 'New Workbook' from the file menu. Once you have a blank workbook, select 'Import...' from the File menu and then select the CSV of our data. From there, you will select UTF-8 as the file origin. This will resolve any character issues and will display all international characters.