Double quotes are entered in each entry of my translated CSV file. Why is this?

While the structure of CSV files is very flexible, some implementations of it are not supported by all programs.

All CSV files processed in Wordbee will be compliant with the RFC 4180 standard, which is the Common Format and MIME Type for CSV. This means, when you create your translated files at the end of the workflow, your files will be fully compatibile with a wide range of CSV readers.

If you want to learn more about this standard, you can check out the specifications here.