BundleSafe lets you update one Java .properties key across its locale files.
Before applying the edit, it shows what will change in each file.
It preserves comments, ordering, separators, escapes, byte-order marks, encodings, and line endings outside the selected values. Multi-file changes are applied as one transaction and rolled back if a write fails.
Search the existing issues first. If the problem has not been reported, open a bug report and include the BundleSafe version, IDE build, operating system, exact error, and minimal steps to reproduce it.
Do not post proprietary translations, credentials, customer data, or an entire private project. Use invented values in a reduced reproduction.