Json document localization problem

I've stumbled upon a problem. Localization selected in the OS influences the format of the floating point saved in the json file.

For example:
Take json object which holds several double-digit numbers, save it in QJsonDocument::toJson().
If you select USA, Swiss or any other the digit is OK: 5.25 (split symbol is a ".").
If you select Germany the digit is not OK: 5,25 (split symbol is a ",").

When you try to read this json file as QJsonDocument::fromJson() you can't do that. This function failed to load this file, because it can't load "," properly as part of the digit.