If the CSV file that is being imported contains extended characters such as vowel mutations “ä, ö, ü,” (used in German) are not being imported. The cause could be the the CSV file was exported from Excel.
To resolve the issue, open the CSV file in Notepad, click
File and then click
File Save as. Choose a new name for your CSV file, change the
UTF-8 and save.
Import the newly created CSV file and the extended characters should be imported correctly.