The sample values (in Latin) are created because of the soapUI Preferences.
If you dislike having these sample values or having to adjust them by hand, you can turn them off by ticking off WSDL Settings->Sample Values checkbox. When you add the WSDL again, the new sample requests will have no sample values and just a question mark. "? "
Settings: Make sure this is unchecked.
When you uncheck the setting, you will have just the ? mark.