Product and version
FileMaker Pro 15.0.2 and ALL prior
OS and version
Mac and Windows
FileMaker Pro only support US-like CSV format conversion; However, in some countries as France for insance, the CSV files are generated with the semi-column separator, so the actual CSV conversion feature available on FMP Import, Export and Open command is unusable on these countries.
See also the following wikipedia article (in french) under § "Variante française" :
How to replicate
If you try to create a CSV file form Excel for instance with french localisation settings, you will see that the separator is not comma but semi-column; If you then try to import this file in FileMaker Pro, you will see that the column are not correctly separated.
For the import / Open commands : Open the file with Excel and convert if to txt (tab separated).
For the export command : Open the file with a text editor and replace all the following 3 digit strings "," by a ";" new one.