Current support is only for occurrences like "UtilProperties.getMessage(", but there are other occurrences such as "uiLabelMap.get(" in java as well. Need to add support for same.
After some recent improvements for groovy handling, still, there is a possibility that someone is using "UtilProperties.getMessage(" in groovy files as well, so IMO, that must also be handled.
For XML forms:
In XML forms current support in handled for auto-fields-service and auto-fields-entity but there are some occurrences of tooltip element of field tag as well, that must also be handled.
For XML Simple Methods:
Doesn't handle case of property-to-field and default-message elements. (Separate ticket created
OFBIZ-9606, just adding it here for reference)