SYMPTOM:
After setting Number and Date Format language to "Italian (Italy)" under Strategy Web preferences, the following error message is shown in the Metric Editor when using a function with more than one argument and switching to Function Editor from Formula Editor:

The metric definition has an error. Please correct before proceeding.

Validation Failed with Syntax Error!

CUSTOMIZATION WARNING:
This customization is provided as a convenience to Strategy users and is only directly applicable to the version stated. While this code may apply to other releases directly, Strategy Technical Support makes no guarantees that the code provided will apply to any future or previous builds. In the event of a code change in future builds, Strategy Technical Support makes no guarantee that an updated version of this particular customization will be provided. In the event of a code change in future builds, Strategy may not be able to provide additional code on this matter even though this customization is provided at this time for this specific build. For enhancements to this customization or to incorporate similar functionality into other versions, contact your Account Executive to inquire about Strategy Consulting assistance.