Special characters in CSV

Hi,

In our application, customers can create a CSV file, but some special characters aren’t exported as is, but as a ‘?’ instead. Example;

Name in application: Çayır

Name in CSV export file: Çay?r

See below for the special characters.

Does someone know how to fix this?

Correct:

ÀàÁáÂâÄäÃã Çç ÈèÉéÊêËë ÌìÍíÎîÏï Ññ ÒòÓóÔôÖöÕõ ÙùÚúÛûÜü Ýý ÿ

Not correct:

ĀāĄąĂăǍǎ ĈĉČčĆćĐđĎď ĘęĒēĔĕĖėĚěĜĝĞğĠġĢģǦǧĤĥĦħ ĮįİıĨĩĪīĬĭĴĵĶķǨǩĹĺĻļĽľĿŀŁłŃńŅņ Ňň ŐőǪǫŌōŎŏƠơŔŕŖŗŘřŚśŜŝŞşȘșŠšŤťŦŧŢţȚț ŨũŪūŬŭŲųŮůŰűƯưŴŵ ŶŷŸ ŹźŽžŻż