Is this a true statement about localization support in IdentitylQ?

Yes, this statement istrue. The default language of IdentityIQ can be changed from English by replacing the appropriate message files. Administrators can modify or replace the default English message files with those for another language, which will then become the system’s default language. This allows IdentityIQ to be localized according to the organization's language preferences.

References:

SailPoint IdentityIQ Localization Guide

SailPoint IdentityIQ Administration Guide (Language Settings and Message File Management Sections)