No, the request is "Please use a method people from all countries can understand". As OP said, the idea here is to use half-spaces as thousand separators. For t

No, the request is "Please use a method people from all countries can understand". As OP said, the idea here is to use half-spaces as thousand separators. For the decimal separator, it doesn't matter much what you use. I'd guess the period because it is slightly more prevalent. This method is clear to all users, rather than confusing all of mainland Europe.