We are pleased to announce the release of Unicode® ICU 77. It updates to CLDR 47 (beta blog) locale data with new locales, and various additions and corrections.
ICU 77 is mostly focused on bug fixes, segmentation conformance, and other refinements.
The Java technology preview implementation of the CLDR MessageFormat 2.0 specification has been updated to incorporate the CLDR 46.1 spec plus most but not all of the CLDR 47 changes.
The C++ technology preview implementation of MessageFormat 2.0 is not yet quite up to date with CLDR 46.1.
Please note that for ICU 78 (2025-oct) we are planning to (a) upgrade from Java 8 to Java 11, and (b) remove the ICU4J Locale Service Provider. See the ICU 77 page for details.