Java Platform, Enterprise Edition (Java EE) 8
The Java EE Tutorial
Bean Validation includes a resource bundle of default messages for the built-in constraints. These messages can be customized and can be localized for non-English-speaking locales.
The following topics are addressed here:
ValidationMessages resource bundle and the locale variants of this
resource bundle contain strings that override the default validation
ValidationMessages resource bundle is typically a
ValidationMessages.properties, in the default package
of an application.
Locale variants of
ValidationMessages.properties are added by
appending an underscore and the locale prefix to the base name of the
file. For example, the Spanish locale variant resource bundle would be