diff --git a/NEWS.md b/NEWS.md
index cb5031dab..835643075 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -4,8 +4,8 @@
 
 * MKVToolNix GUI: multiplexer: pressing the keyboard shortcut for the track's
   "Language" label (Alt+L for English) will now open the language dialog.
-* all: updated the list of ISO 639-3 language codes with the latest official
-  changes.
+* all: IETF BCP 47/RFC 5646 language tags: updated the various lists of valid
+  subtags from the official specs.
 
 ## Bug fixes