Number format - Decimal seperator

Siebel supports multiple countries, currency, date time zones everything. We can see country specific number formats, time zone conversion when we login to Siebel with different user profiles.

However when we receive inbound web service requests from multiple countries, is there any way to respond those requests in formats and time zones based on source country?

Example, in Netherland decimal separator is comma instead of point. Now the Siebel response xml has numbers with decimal separator as point, which is interpreted wrongly by third party systems.

Thus is there any way, where we can respond in different decimal format when we get to know that the request is coming from Netherland?