[WirelessGigabit]

No. Just no. The amount of times I've had issues with CSVs exported from a non-US locale is insane. They use semi-colon as separator, as for some weird reason they use the comma as the decimal point.

Then there's the issue of encoding, as that is also not the same across locales. Then you get a CSV with the BOM characters up front or some French accents represented as ? because of incorrect encoding parsing / saving.

At least JSON doesn't have any of these things. Standardized strings, and standardized number format.