We export using what is called UTF-8 encoding. As long as the string displays correctly in Pipeline, then it will export correctly using this format. Sometimes these settings depend on your Excel settings and this is common with default European vs North American settings in Excel.
If switching the export from a comma-separated value to a semicolon-separated does not work ( https://app.pipelinecrm.com/user/currency), it could be a UTF-8 issue. If this is the case in Excel go to Data > From Text, select the CSV file, and follow the steps in the Text Import Wizard.