Every form has a locale, set on the "form1" subform. You can change the form's locale by going to "File | Form Properties... | Defaults" and changing the "Default Form Locale" dropdown. (Note that this menu option is only available when you have a form open.)
Every object on the form will, by default, have the same locale as the form. If you want an object to have a different locale than that of the form, select the object on canvas, and go to the Object Inspector's Field palette. At the bottom of the palette (you may have to resize if to see this) there's a "Locale" dropdown. This sets the locale of the selected object.
If the selected object is a subform, then all the objects in that subform will inherit the locale of the subform (instead of the locale of the form).
Stephanie Legault
Software Developer
Adobe Systems